This is a male of Chorthippus brunneus. It has angled keels on the pronotum, brown knees of the hind legs, a red abdomen and typical wings with the (difficult to see) lobe on the underside. It is a very good flyer and you can find it regularly within cities and towns.
ID
by Hendrik Devriese (Belgium)
Checklist of UK Recorded Acrididae