Thanks all, actually managed to get the people round who put the Cons up and theyve done a temp repair with sealant - they were wandering around the roof without a care in the world!
Actually looks like its my wall above thats ultimately the problem, think it will need re-rendering - happy...
The only problem I can see is it's the entire width of the conservatory and short of climbing on the conservatory roof there is no way to get to it... There is a window above but from there I can only get to 75% of it.. Thats why I was thinking sealant in a gun would give me the extra reach?
So was a little surprised to find water dripping at a rate of knots through my five year old conservatory last night. Was coming in by the wall under the lintel. On investigation this morning (and after a fair bit of internal plasterboard came down) the flashing where the conservatory joins my...