MARCUS Trescothick last night admitted England could not afford to show the same kind of complacency they displayed against Bangladesh if they were to harbour realistic ambitions of completing a NatWest Series and Ashes double against Australia this summer.

Trescothick, who captained England for the second game in succession in the continued absence of the injured Michael Vaughan, was happy with the outcome of yesterday's five-wicket win over Bangladesh.

But, after watching his team-mates put down a succession of catches in an error-strewn fielding display, the Somerset batsman admitted things will need to improve if England are to halt Australia's recent revival in its tracks.

The two sides meet in a day-night encounter at Edgbaston tomorrow, before going head to head in the NatWest Series final at Lord's on Saturday, and England's players will need to be far more ruthless if they are to succeed in those games.

"There were a few things that didn't go to plan," admitted Trescothick, who combined with man-of-the-match Andrew Strauss to put on 99 for the first wicket. "We didn't start the game very well at all.

"We didn't start as our normal, businesslike selves and it took us 15 or 20 overs to get going before we settled down.

"We certainly can't afford to take 20 overs to get settled against Australia. If we take 20 overs to get into our stride against them, they will hurt us."

England ultimately ran out comfortable winners with more than 11 overs to spare despite a relatively subdued performance with both the bat and ball.

The victory was their fifth success of the summer against Bangladesh and Trescothick admitted that the routine fashion of most of those wins may have played a part in yesterday's sub-standard display.

"We've been playing a lot of high-intensity cricket recently," he said. "And I think that's been good for us. I wouldn't say there was no meaning to this game, but it maybe wasn't as intense as a lot of the other games we've played.

"I don't want to use that as an excuse because we know we can't afford to switch off in any game.

"But, in the Twenty20 game and the game against Australia at Bristol, we were really up. We need to be like that in every game and on every day for the rest of the summer."

The two major plus points from yesterday's encounter were the batting of Strauss and the bowling of Andrew Flintoff.

The Lancashire all-rounder took four for 29 as England restricted Bangladesh's batsmen to a little over four an over, and proved his troublesome ankle injury is now a thing of the past.

"I thought Freddie bowled really well," said Trescothick.

"He came on at two interesting times in the game and did the business for us.

"The momentum was changing when he was bowling, and he was the one changing it for us.

"He bowled some cracking yorkers at the end and, for me, that was better than I've seen him bowl for quite some time."