Casual, large ish, cheap holiday bag?

[WhyHasAllTheRumGone]

As above. Off on holiday in 11 nights and need something for carrying around all the stuff that comes with kids. Thinking sort of canvas messenger? So I'm not worried about using it and it can be practical.

Any suggestions, please?

I got a lovely beach bag - sort of navy geometric print - from Primark. So nice I've used it for day to day stuff. So nice that the manager of a fancy boutique ran over and asked me where it was from and when I told her, she sort of gasped, 'but it looks so expensive!'

Thank you, Primark