Quicksmart Easy Fold Stroller £80.11 @ Amazon
I actually reviewed the Quicksmart Backpack Stroller some time ago, and this is one of it's family members. It is a 7.5kg pushchair which folds up extremely compact and has a conveniently easy fold and folds up into a carry bag for ease of transportation and storage. It has 4 wheels, a 5 point safety harness and dual rear breaks. There's also a fully retractable canopy with a viewing window for line of sight between parent and baby.
The reviews for it are overwhelmingly positive and people love that it's light weight, folds up easy and stands up in a folded position. It has received 3.8 out of five stars and is worth looking at if you need a runaround that doesn't take up too much space.
It's suitable from 6 months old and up to about 15kg.