How to run a swim school in the UK: stages, ratios, pool hire and the rules

Pick a framework before you pick a pool

Every UK swim school teaches to one of two national frameworks, and the choice shapes your class list, your badges, your teacher qualifications and your marketing. Parents ask 'what stage is she on?' and expect an answer that means the same thing at the next school.

Swim England's Learn to Swim Programme is the one most parents recognise. It runs Pre-school (Discovery Duckling and Duckling awards for babies and toddlers with a parent in the water), then Learn to Swim Stages 1 to 7, the core syllabus for primary-age children, then Aquatic Skills Stages 8 to 10, where a swimmer picks a specialism such as competitive swimming, rookie lifesaving or snorkelling. Stage 7 is the point at which Swim England considers a child a competent, safe swimmer. The Scottish, Welsh and Northern Irish bodies run close equivalents.

The STA's International Learn to Swim Programme is the other. It starts with Starfish awards for babies, then STAnley First Steps for young beginners and an Octopus series for children starting later at five to eight, then Goldfish (15 metres unaided by the end), Angelfish (25 metres, all four strokes, sculling and entries) and Shark (100 metres, starts, turns and basic rescue).

Neither is better; they are different ladders to the same place. Choose by which one your teachers are qualified in, which one the pools near you already use, and which one your local parents talk about. Then build your class list as one class per stage, because that is the unit parents book and the unit you move children between.

Ratios: the numbers that set your prices

The teacher-to-learner ratio is the first thing a pool operator will ask about and the biggest single input to your pricing, because it fixes how many fees fill an hour of pool time. The reference document is Safe Supervision of Programmed Swimming Lessons and Training Sessions, published jointly by Swim England, Scottish Swimming, Swim Wales, the STA, RLSS UK, CIMSPA and others. Its ratios are a starting point for the pool's own risk assessment, not a legal maximum, and the pool's operating procedures can set lower ones.

The baseline ratios it recommends: adult-and-child classes, twelve pairs to one teacher; children aged three and a half to five, six to one; any class taught from in the water, six to one; beginners, meaning anyone who cannot yet swim 25 metres in a recognised stroke, twelve to one; improvers who can, twenty to one; mixed-ability groups with no beginners, twenty to one; competitive club squads, thirty to one. Swimmers with special educational needs or disabilities are assessed individually, from one to one upwards.

Most private swim schools sell smaller groups than the baseline: four to six per teacher at the early stages is the norm in the market and is what parents are paying a premium for. The guidance also lists what should push a ratio down: a badly defined teaching area, sharing the pool with public swimming, water deeper than the level needs, poor water clarity. Write the number for each stage into your class capacity and let bookings stop there; a full class is a waiting list, not a bigger class.

Who is the lifeguard?

The Health and Safety Executive's guidance for pool operators, Managing Health and Safety in Swimming Pools (HSG179), sets the frame: the operator is responsible for safety in the pool, and everyone providing a lifesaving role, lifeguard or teacher, should hold an appropriate award. Within that, the Safe Supervision guidance says a separate lifeguard may not be needed during a programmed lesson if the teacher has the lifesaving competency to cover it themselves and the pool's safety operating procedures say so.

The award that provides that competency is the RLSS UK National Rescue Award for Swimming Teachers and Coaches (NRASTC), a two-day course valid for two years. There is a lighter version, NRASTC Light, for pools where a lifeguard or first-aider can respond quickly. Teachers who take an unprogrammed public session, or who are in the water, cannot provide the cover: lifesaving provision cannot be delivered from in the water, so a teacher in the pool with a beginners' class needs someone with the competency on the side.

Practically, ask the pool operator what their procedures require before you quote a parent a price. A leisure centre that insists on its own lifeguard for every lane you hire will charge for it. A school pool with no staff of its own puts the whole safety burden on you, and your insurer will want to see the NRASTC certificates.

Teacher qualifications

Both bodies run a two-level structure. Swim England's route is the Level 1 Swimming Assistant (Teaching) qualification, for someone who supports a lesson under a Level 2 teacher, and the Level 2 Teaching Swimming qualification, for the person who plans and leads the lesson. STA runs the equivalent Level 2 Certificate in Teaching Swimming with a Level 1 award beneath it. Either Level 2 is what pool operators and insurers mean when they say 'a qualified swimming teacher'.

Add to that the NRASTC or equivalent rescue award, a current first aid certificate, safeguarding training and an enhanced DBS check with the children's barred list, because teaching swimming is regulated activity. Both governing bodies offer membership that bundles insurance and continuing professional development, and both publish a code of practice for their members.

Hiring pool time

Very few swim schools own a pool. You hire from a leisure trust or council, a school, a hotel or health club, or a private pool owner, and the terms of that hire decide more about your business than anything you control. Things to settle before you sign: the exact lanes or area and whether the public will share the water; who provides lifeguard cover and at what cost; changing-room access and whether parents can watch from the side; water temperature, which matters for babies and younger children; the notice period if the pool closes for maintenance or a gala; and whether you can renew the same slot for the next term before it goes back on the market.

The pool's Pool Safety Operating Procedures, the Normal Operating Plan and the Emergency Action Plan, apply to you and your teachers. Ask for them, read them, and brief every teacher on the emergency procedure for that pool before their first lesson. The Safe Supervision guidance expects teachers to be trained in the pool's Emergency Action Plan and to practise it.

Pool hire is a fixed cost paid per hour whether the class is full or not, which is why the capacity and waiting list discipline matters more for a swim school than for a club in a free church hall. Two swimmers short in every class across a Saturday is a large slice of the day's margin.

The scheduling problem stages create

In most children's activities a child stays in a class for a term and moves up by age in September. Swimming is not like that. Children pass stages when they are ready, which is any week of the year, and a Stage 3 place that empties in week four should be filled from the Stage 3 waiting list, while the swimmer who left it now needs a Stage 4 place that may not exist on the same day.

This is why swim school timetables are built around adjacent stages on the same day and time: a Stage 2, 3 and 4 running side by side at 9am on Saturday means most move-ups are a change of lane, not a change of day, and the family's Saturday routine survives. A school that runs Stage 3 on Tuesday and Stage 4 on Thursday loses children at every promotion.

It is also why rolling enrolment with a monthly payment suits swimming better than fixed terms with a lump sum. A child moving up mid-term on a rolling plan simply carries on; on a termly plan somebody has to work out a pro-rata refund and a new invoice. Whichever you choose, the rules a parent needs to know are: when assessments happen, how they hear their child has passed, and what happens to their place if the next stage is full. Write them down and put them on the booking page.

What to look for in swim school software

The generic checklist in our guide to choosing class software still applies. For swimming, add: a class per stage with its own capacity, so ratios are enforced by the booking system rather than by you refusing bookings; a waiting list per stage that offers a freed place automatically, because the place empties on a Tuesday night and the parent who wants it is not you; a one-click move from one class to another that carries the register, the medical notes and the parent's record with it; registers that work on a phone in a wet, echoing poolside; a timetable that can hold three pools and eight teachers without a spreadsheet; and monthly instalments collected automatically. Then check the price model: a school with 300 swimmers on a per-booking fee pays several times what a flat monthly fee costs.

RocketClass was built with exactly this shape in mind; the swim school page shows how the stage move and the waiting list work. But the requirements above are the requirements whatever you buy.

The rest of the checklist

Everything that applies to any children's club applies to a swim school: Ofsted registration is not usually required, because a lesson teaching a specific activity for under two hours a day falls under the activity-based exemption; you need public liability insurance, an ICO registration for the parent data you hold, safeguarding policies and a designated lead, and a risk assessment for each pool you use. Our guides on the licence question, safeguarding basics and health and safety cover those in detail.

The swim-specific extras: a photography and phone policy for the poolside and changing rooms, which parents will ask about; a clear rule on parents in the water for the adult-and-child classes; and a plan for the day the pool cancels on you, because it will.