It gave the home side a 160-run victory which virtually guarantees their place in the First Division of the new national league next season.
Leicestershire, having been put in, totalled 222 for 8 with Vince Wells top scoring with 77 off 99 balls and Phil Simmons hitting an unbeaten 40. Then Ormond and Dakin, who are first and second in the Axa League bowling averages, took over.
The Middlesex slump began with the first ball when Keith Brown was run out with a direct hit on the stumps from Wells. Then Ormond, in an unbroken eight-over spell, wrecked the top order, taking his four wickets including that of the England selector Mike Gatting, who had his middle stump uprooted.
The Ormond burst left Middlesex on 40 for 6 and the all-rounder Dakin completed the demolition job by taking the last three wickets with the second, third and fourth balls of his fourth over.
He had Jamie Hewitt caught at gully by Chris Lewis, trapped Angus Fraser lbw and then knocked back Phil Tufnell's off stump for the first hat-trick of his career finishing with figures of 3 for 10. Earlier, both Dakin and Ormond had contributed to the Leicestershire batting effort with Dakin scoring 29, including two sixes off Tufnell. Ormond made 11 not out, smashing the last ball of the innings for a straight six which shattered one of the windows in the pavilion dining-room.
James Kirtley returned a competition-best 4 for 21 as Sussex gained their first Sunday League win over Yorkshire for nine years. The home side sped to their sixth victory of the season with 16 overs in hand after bowling Yorkshire out for just 89 in 38 overs at Hove.
The all-rounder Robin Martin-Jenkins, who helped restrict the visitors with 2 for 12 in eight overs, followed up by hitting 44 as Sussex made light work of their target for a six-wicket success. He shared an opening stand of 63 with Rajesh Rao, who was run out for 21.
Their captain Chris Adams fell to a second-ball duck, caught at mid-on off Michael Vaughan, before Martin-Jenkins was trapped leg before by Matthew Hoggard after hitting six fours from 49 balls.
Hoggard, playing only his second Axa League game, claimed his second wicket by having Mark Newell lbw. But James Carpenter and Keith Newell then steered Sussex home with an unbroken fifth-wicket stand of 21.Reuse content