It is the RV10K (if you click the pic once it should go a bit bigger so you can read the number). They were actually just over 1100 runners (limit was 1500).
Not Pendle in the background, it is the Birdie Brow edge of Longridge Fell.
Facebook pics not mine, mine are on the SportSunday site........................
The chap in the red vest in 1st pic was 1st VET 50 and clocked the 2nd best time in the UK this year for his age group in the race.
I managed to sell 1 or 2 pics to Athletics weekly (they to confirm if using 1 or both of the leaders pics (not posted)). Think it's out on Friday.