Boots has 20% off full priced clothes now with code MINISAVE20 (case sensitive). But it worked for me when ordering those tops. The 20% is deducted from the original price so
£3 - £1.2 = £1.8
Sizes available: from 9-12 to 5-6 years.
Not sure if you can use the code many times so shop wisely ;)
Code is valid till 11th October.