Thats great - thanks for all your suggestions.
I tend to shop at both Tesco and Sainsburys so I'll check out which of the suggested brands they have.
I'll be keeping them on wet food with an extra bowl of dry biscuits for snack time.
They are fed 3 times a day so I guess I'll start off with one feed a day on the new food to see if they tolerate/like it.

We have a litter of kittens due any time so I'll also be on the hunt for some good kitten food in a few months.

Cheers,

Diane