First, thanks for your replies.
Quote
Dbl: West must have felt Pass was forcing (correct) and admit it, this hand is NOT great for 5♥. Sensible player, this West guy. I hope this was the opening poster
Sorry to disappoint you

, but I was South, the declarer.
As soon as p XXed my 4
♠ bid I was thinking I had overbid my hand terribly to give him this confidence. Hence the 1st Question.
I didn't know what was happening until I reviewed the play later.
I saw that 4
♠ could be set too, and knew I was only escaping luckily.I wanted to know how EW could have done better.
Strangely, what was W thinking when he returned the
♣8? He was not expecting a ruff after his p showed out in trumps when I returned to dummy at trick 5. His only hope lies in
♥, but he did not return it.
The opening lead
♦K was also peculiar to me. If W had not supported
♦ I would think this could be a singleton, would you?
One last point was on 2 tables EW managed to make 6
♥ on this hand. The auction went 1
♥ p 6
♥ p p p. North would tend to lead
♣ rather than
♠, and that gives EW all 13 tricks!
Quite interesting hand...
W N E S
1♥ p 2♦ 2♠
3♦ p 4♥ 4♠
X XX p p
p
lead ♦K
4♠XXS+1
+15.8 IMP to NS