Clever tactics from Paul Best?

England Under 19s won their ODI game against Sri Lanka on Friday easily in the end, even after rain had interrupted the match and meant that Duckworth Lewis had to come into play. But there was an interesting incident when in persistent rain England's skipper, Paul Best, caught one of the Sri Lankan's a few balls before 20 overs had been completed and - realising that England were ahead on D/L but that 20 overs needed to be completed for it to come into play - immediately dropped it again. His thinking was that a wicket would have increased the chances of the umpires taking the players off for rain before the 20 overs were up, robbing England of certain victory.

As the bowler, I imagine Luke Wells would have had mixed feelings, but it also calls into question whether a deliberate drop is within the spirit of the game. In the end the players were able to come back out after a rain break and complete the match, all be it with Sri Lanka's overs reduced, so it didn't matter. But either way, I think it was a very sensible tactic to ensure that England won the game and I don't see why it's been suggested that it was outside the spirit of the game. Your thoughts?