what about bags like this?

[PollyPerky]

Joules

Ted Baker also have something similar.

I need a light (not heavy) bag for everyday - ie nip to supermarket, drive to office - to keep all my bits in. I'd got a Longchamps Pliage and it drives me mental because everything gets lost at the bottom.

I've a lovely Coast bag for 'best' but I don't want to bang it about everyday throwing it into supermarket trolleys etc. (I don't like shoulder bags because they give me back ache.