Suitcases?

I've never seen an airport that charges for carts in the UK. I'm not sure about other airports, but Heathrow, Aberdeen and Edinburgh definitely don't, as I've had MANY bags at all three and have never paid.

I'm pretty sure that when I flew out of Bristol last month, we did have to pay for trolleys.  I may be wrong as I've had to travel through several airports in recent months, but I do think they charge.  I remember us hauling several bags along with our daughter's pushchair at the same time rather than getting a cart, which would have been easier.