St. David's kept alive their hopes of the Commercial Cricket League's coveted double when they beat Leg Trappers - despite playing three short - to set up a meeting with Watford Sports Club in this weekend's knockout final.

St. David's overcame their huge numerical disadvantage to reach their challenging semi-final target of 203 at Garrison Field - whose long grass is a far cry from the lightning fast outfield at Lord's, their home ground - with two wickets in hand while truck driver Sidney Simmons delivered the goods to help guide Watford to a four-wicket win over West Indian Association in the other semi-final at Police Field.

St. David's found themselves short with skipper George O'Brien and Henry O'Connor away and key bowler Ken Pitcher camping for the weekend while Reginald Pitcher has rejoined Warwick and is no longer eligible.

Watford go into Sunday's final with four knockout titles under their belts while St. David's will be chasing their first but the east Enders - losing finalists against league and knockout champions Forties at Lord's last season - will start clear favourites having twice beaten the west Enders this year when they ran away with the league title.

Leg Trappers, who won the toss, began disastrously. Openers Gary Knight and Chris Fleming holed out to skipper Allen Richardson at mid-off from the bowling of Jeff Pitcher (two for 22) and number three batsman Andy Trinder was run out without scoring as Trappers slumped to 12 for three.

Jonathan Hughes joined Graham Strange to stage a mini-recovery before he was also run out, for four, with the total 43 and after 20 overs Leg Trappers had only reached 54 for four.

But by now Strange had played himself in and after the drinks break he and Damion Henderson started to score more freely before Henderson was out for 24.

Strange reached an excellent half century and was eventually out in the 34th over for 66, including three sixes and a four.

The total then was only 132 but a superb unbroken stand between James Swan (43 not out, containing three fours and two sixes) and Justin Freisenbruch (42 not out, with six fours and a six) took Trappers past the 200 mark as they smashed 70 runs in the last five overs, including one brutal over from George Cannonier - the final over of the innings - which went for 22.

St. David's got off to the worst possible start themselves as Mark Wetherhill bowled Jeff Pitcher with the first ball of the innings. Wetherhill then bowled George Cannonier with the score eight and Leg Trappers were on top.

However, Shea Pitcher and skipper Richardson repaired the early damage with sensible batting. Richardson made the most of being dropped before he had scored, and the pair put on 102 before Pitcher was eventually caught on the boundary for 65, which included five fours and a six.

When Richardson was run out for 48 with the total on 137, the match was still in the balance and excellent spells from Swan (who went for just 16 runs from his eight overs) and Strange (22 from seven) prevented St. David's from accelerating towards their target.

However, two disastrous overs swung the game firmly St. David's way.

Skipper Knight brought himself on for one over which cost 17 runs, followed by an over from Hughes which included six wines. Number five batsman James Pace batted with increasing authority to reach his half century as St. David's reached their target with 17 balls to spare, Pace's unbeaten 58 containing six fours and two sixes as he and Granville Bennett (nine not out) featured in an unbroken sixth-wicket stand of 56.

Slow bowler Simmons, who began playing for Watford this season, took advantage of a turning strip to snap up four for 21 in seven overs as West Indian Association, who won the toss, slid to 138 all out in the final over.

Medium pacer Blake West chipped in with two for 22 while WIA's best contributions came from skipper Barry Richards (31) and Dave Greenidge (26).

WIA hit back to reduce Watford to five for two but Simmons, batting at number eight, came good again with an unbeaten knock of 25, teaming up with Mike Corday, whose unbeaten 49 included three boundaries, to seal victory with five overs to spare.

Fast bowler Stan Francis (two for 19) rocked Watford when he bowled Jim West, whose 81 put paid to Forties' hopes in the first round, for a duck in the first over and fellow opener Terry Corday went for three. David DeSilva helped Michael Corday stabilise the innings with a knock of 34.

Watford's cause was given a major boost when Greenidge's one over, which took 12 deliveries to complete, went for 21, most of them wines and no-balls.

"That one over, the 11th of the innings, killed us," said skipper Richards. "They were only 13 for two after 10 overs and we had them on the run." Edwin Wickham and Jerry Callender also picked up two wickets apiece.