Two of the UK's leading sunscreens don't offer the protection they say they do, research carried out by Which? has found.
The consumer group tested 13 popular sunscreens to see whether they lived up to claims to provide a sun protection factor (SPF) of 30 but Boots Soltan Protect and Moisturise (£4.50 for 200ml at Boots.com) and Hawaiian Tropic Silk Hydration Protection Lotion (£7.50 for 180ml at Boots.com) both failed the tests.
Which? said the two products offer just two-thirds of their claimed SPF and have labelled 'Don't Buy' products accordingly.
The Hawaiian Tropic product has failed this test for two years in a row.
Sunscreens are designed to protect skin from UVA and UVB radiation, which may increase the risk of developing skin cancer. Both products passed the UVA tests and their manufacturers have denied that their sun creams are not effective enough.
Which? executive director Richard Lloyd, said: "We're very concerned that a further two popular sunscreens have now failed our tests. Consumers must be able to trust and rely on the information provided by manufacturers so it's disappointing to see well-known brands
falling short. We want them to take action to ensure their products deliver the promised protection."
A spokesperson for Boots said it was confident that it products met its labelling claims, while Hawaiian Tropic said all its lotions were rigorously tested and its own test results even exceed their labelling claims.
The Which? research used British Standard Tests and all 13 products were tested on 10 volunteers.