Some suggestions already (thanks to BB and HH) -
"Maulden 5 mile (halfway between Luton and Bedford) on 2nd July (Saturday)
Luton Hoo 5 mile on 3rd July (Sunday)
MK 10K on 5th July (Tuesday Evening 7:30 or 7:45). This is part of the Grand Prix series but you can run individual races and MK is a nice run which is also very flat so would recommend if you can make an evening
If you enjoy racing off-road why not enter the Marston Vale Forest 5K on Friday 24 June."
Anyone know anything about these?