Michael Mann's Collateralhad a solid opening through UIP, taking £2.4m to secure the number one slotin the UK.

It knocked Open Water,distributed through Redbus, down into second place in its second week. The lowbudget shark attack film has now taken an impressive £3.4m.

Elsewhere, three Britishproduced films struggled to make a major impact. Warner Bros release Traumawent out on 176 sites, but took just £144,000 - taking thirteenth place on thecharts.

Ken Loach's Ae Fond Kiss,distributed by Icon, was in sixteenth place, taking £107,000 from 62 sites.Michael Winterbottom's Code 46, distributed by Verve Pictures, racked up£60,200 from 54 screens, in seventeen place.