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This grasshopper bears a striking resemblance in its wing shape and length to a female Chorthippus montanus (the Water-meadow Grasshopper), a close relative of Ch, parallelus (the Meadow Grasshopper), and which is not known from the British Isles. Do you have any more photos, preferably showing the abdomen tip? The ovipositor valves of Ch. montanus are noticeably longer than those of parallelus. The song of montanus is louder and slower than that of parallelus.
I have added the only (poor quality) photo which shows abdomen tip.
Thanks. Your second photo shows a male. If it's the same individual as photo 1 it has unusually short wings for a male of either species. The safest conclusion is that it is just Chorthippus parallelus, however, in Scandinavia Ch. montanus occurs much further north than parallelus, so it is not impossible that it might remain undetected in northern Britain.
Yes, it is the same individual which I chased for some time. I have added anorther photo of it.
The quality of your photos is excellent.
May I ask what camera and lens you use for your close up shots ?
Thank you for your kind comments. My camera is a Canon 60 D with a 100mm Canon Macro lens with image stabiliser. I use a monopod for extra stability. Even so, I still have many, many failures when trying to photograph insects in the wild. I took about 15 shots of this grasshopper as I chased it through the scrub but scrapped most of them.
Lat/Lng: 54.2398, -2.8416
OS grid ref: SD452830