No7 Laboratories Line Correcting Booster Serum has been a hit with shoppers since it launched in 2017, and is now on sale for just £10 at Boots – but only for a limited time No7 Laboratories Line Correcting Booster Serum has been a hit with shoppers since it launched in 2017, and is now on sale for just £10 at Boots – but only for a limited time Lifestyle