Hi Guys I'm the OP.
Thanks for all the suggestions - and I'm sure that I have read all the responses.... btw I'm not a novice - I got my car drivers licence in
1960, and my motorbike D/L before that!As I said in my first post, I knew that the classical solution to engine flooding was to hold the throttle open wide while cranking. However I had tried that, and it didn't work.
So how long do you gun the starter before you have completely flattened your battery?
I now realise (from the Celica Driver's Manual) that Toyota advises to use WOT and zero throttle starts alternately until the engine fires up. Toyota advises 15 seconds each try.
Both the engine & the battery are in fine condition.
As I said the eventual cure was to pull the plugs and dry them. I then I got an instant start.
David