Where can I get armbands for my 20 month old

I got some In Matalan last year but loads of places will probably have them in cos it's summer. Definitely the swimming pool or try Asda or maybe even b&m

Even Amazon

Amazon, home bargains, Argos
I don't know if they still do (not been swimming for years) but you could buy them from the swimming baths themselves

I find a vest float is so much better and easier. You can get them on amazon for about £15-20 xx