Lady Milne Match 4 ..board 7 killed me

I am just after finishing Lady Milne trials match 4 and thought I did pretty good although missed a few chances near the end on boards 9 and 10. However there are no mulligans allowed so we don't go back and replay any board.
On scoring up I find out I got killed on Board 7 where the Jack robots East West bid and made 4H against me. Going to look at this board now and see if I butchered the defence or it was a bad lead or what. I am losing 11 imps on the board against the Ladies datum. That's like half a match.
Just like the slam on board 30 of last match.

There is nothing I can do against 4H no matter how I defend.
Simple and maybe double dummy line of spade towards QT7 and playing 7
or running the 8 eventually set up the spades for a diamond discard. However we won't suffer on that simple line that works. Also after my 1!C opening and Heart King appearance any declarer is in good shape regarding the big cards..
Finally the line of play which would produce a fine burst of energy ...
There is some kind of guard squeeze which operates ..
On the run of the Hearts even after playing a spade to the 10 (a lesser play)
South gets squeezed out of his(in my case) 3rd diamond or 3rd spade..and the spade Queen is up for a diamond discard ...or the 3rd diamond in declarers hand grows up.
No problem Eamon loses 11 imps to the Ladies field ...

I guess Jack can play a bit of bridge ...

Somebody on 5H-2 ..Somebody in 4S-2 Two folk down in 4H.

Its just impossible to go down in this contract of 4H.

Eamon is the poor sod in the 17v 18 pairing losing 11 imps