I’ve found that Sainsburys do the best clothes and for a fairly reasonable price.
I’ve bought clothes for Miss NHM from Tesco’s and Asda before but they always wash funny and don’t last anywhere near as long as the clothes I’ve bought from Sainsburys.
Sainsburys regularly offer 25% off their clothes for a weekend.
In order to be ahead of the crowds, you can sign up to be alerted of the discount by email.
You just need to sign up to their website for the newsletters.
You can sign up: https://tuclothing.sainsburys.co.uk/c/kids/kids
(You may need to sign up for a Sainsburys account to receive these email alerts. I can’t remember!)