Help me 'do' casual. . .

[WheresTheCat]

I've forgotten how to do it! My smart clothes are all new and lovely, but I don't have any idea what to wear at the weekends when running round with the kids. I still want to look good - I haven't worn trousers fr ages as I have a big tum and bum - but think that perhaps these are the way forward!
I'm 35 - so need to look a bit more grown up - but what do you all wear?

I'm 34 and live in boyfriend style jeans from next, converse trainers and plain back t-shirts.

You can add variety to your wardrobe with either a pull on hooded top (boden half zip seems good, 30% off til midnight tonight) with a gillet over, or the obligatory North Face Tri climate evolution jacket, in black