Thanks Tomb and K2-K6 for your kind comments.
The sump drain plug was also repaired the same way and both have now been re-fitted. The bike's been filled with fresh oil and the engine turned over without firing to avoid getting petrol down the dry bores.
Just waiting for a break in the weather to go for a run in a much easier frame of mind than this time last week.
Here's another picture of the bike.