Well, FWIW Robin400, seeing as a) I wasn't in that helicopter, b) I've never flown out of Oulton Park and c) this 'incident' wasn't publicised either on here or in the national media, how on earth is it meant to 'ring a bell'?
Were you IMC at this time? Because, otherwise, I can't see how it relates to my post about concerns about meeting gliders in IMC.
(If you were VMC, which I suspect you were, then I can only surmise from your very brief details that 'see and avoid' worked in this case - ie
you saw him, so
you avoided him. There's every chance that the heli pilot never even saw you.
The fact that you had your Mode C 'on' was absolutely the right thing to do. But remember a couple of facts - although some IFR helicopters have TCAS fitted (ShyTorque is one of the 'lucky' ones), the majority don't. And, secondly, if the heli was in the climb-out, there's every chance that he was either too low level or had not had the time to receive a radar service from Liverpool or Manc.)