Independent UK buyer's guide

Sunscreen scored by what it does, not who made it

We rate formulation categories out of 100 against published testing standards. Not products. Not brands. Nobody pays for placement, and there is no placement to pay for.

What this guide does differently

Most sunscreen advice ranks products and earns commission when you buy one. We score categories of formulation, so there is nothing to sell you and nothing for a manufacturer to buy. The trade off is that we will never tell you which bottle to pick up. The benefit is that everything here stays true when the products on the shelf change.

8Category reviews, each scored out of 100
6Explainers on standards and evidence
0Brands named anywhere on this site
£0Taken from manufacturers, ever

The scoring method in five parts

Every category is marked against the same five criteria. Dose delivery carries as much weight as filter chemistry, because a sunscreen you apply thinly protects thinly.

Full method
1

Broad spectrum evidence

Does the filter system cover UVB and long UVA, and is that demonstrated rather than asserted? Worth 25 points.

2

Realistic dose delivery

How much product actually reaches skin, against the laboratory dose the SPF was measured at? Worth 25 points.

3

Wear and reapplication

Does the film survive water, sweat, friction and time, and does the format invite topping up? Worth 20 points.

4

Tolerability

Recorded rates of irritant, allergic and photoallergic reaction for the filter class and its usual companions. Worth 15 points.

5

Label transparency

Does the format usually tell you the filters, the UVA rating, the water resistance claim and the period after opening? Worth 15 points.

The eight category reviews

Each one scores the formulation types inside it, lists the ingredients by INCI name and answers the questions people actually ask.

All reviews

Sensitive skin

Which formulation types cause the fewest reactions, and which ingredients drive most sunscreen complaints.

Read the review

Water resistant

What water resistant and very water resistant are actually tested to, and which textures survive real swimming.

Read the review

How to read an SPF label

Six things on a UK sunscreen pack carry real information. Everything else on the front is presentation. This is the whole primer, and it takes about a minute.

What you see on the packWhat it actually tells you
SPF 30 or 50The number rates UVB protection only, measured at a laboratory dose thicker than almost anyone applies. Choose 30 for daily UK wear and 50 for strong sun, holidays and children.
UVA in a circleThis mark means UVA protection is at least a third of the labelled SPF, tested separately. If there is no circled mark and no star rating, you know nothing about UVA performance.
Four or five starsThe UK star system rates UVA protection relative to UVB. Stars describe balance, SPF describes magnitude, so you need to read both together.
Water resistantA tested claim: at least half the SPF retained after two twenty minute immersions. Very water resistant means four immersions. Towel drying removes the film regardless.
The open jar symbolThe period after opening, in months, counted from the day you first opened it rather than the day you bought it. Twelve months is typical for a sunscreen.
The filter namesUV filters are declared by INCI name in the ingredient list. This is the only part of the pack that tells you what is doing the protecting, and it is on the back.
The fastest check in the aisle. SPF 30 or 50, then look for the UVA in a circle mark or four to five stars. If neither is there, you have no information at all about UVA protection, and UVA is what drives ageing and pigmentation. Our UVA and UVB explainer covers the ratings in full.

No brand pays for placement

There is no placement to pay for. We do not name products, take affiliate commission, accept sponsored content or run sunscreen advertising. Scores rate formulation categories against published standards and public evidence, and they are the same whether a manufacturer likes them or not.

Updates when the evidence moves

Testing standards get revised, filter permissions change and guidance is updated. We send a short email when a review changes to reflect it.

Occasional updates when standards, permitted filters or public guidance change. No product recommendations, because we do not make any.