Pilot light has gone out on my Biasi 28S. Any ideas?

The pilot light went out last night on my Biasi 28s combi boiler. The green panel light on the bottom of the boiler is on but no red button light. I have tried to switch it all off at the mains in the hope that it will reset itself but to no avail. It's still in the same state it was before I switched the mains off. I gave it a bit of a bang in temper and it lit but then went out again. Now I can't get the pilot light to light up at all.

Any ideas would be really appreciated.

Cheers