sh1t looks like you have a lot of rubber to find?
I've checked up into the block etc. I don't see any more in there. As there was new instant gasket round the sump, I called the guy my dad bought it off (last saturday in Derby, long day there & back) He said they had no problems. I suspect this has been ongoing for a while but he didn't want to tell me.
Wonder if that's why they sold it.
We'll probably run it for a while then drop the sump to see if any more has been washed down.
Glad we found the problem though
Geoff