Kevin Pietersen has labelled England's Test series defeat to West Indies "horrendous" but is determined to make amends for a dismal winter in the forthcoming one-day series.

Pietersen and the rest of the England squad were disappointed to lose the Test series 1-0 having arrived in the Caribbean as favourites to win comfortably.

That defeat leaves England still searching for their first victory in an international match this winter, which is hardly the best preparation as they build-up to this summer's Ashes series.

But Pietersen believes the attacking cricket England played in the tense draw in the final Test at Queen's Park Oval will help to end that miserable sequence of results as they attempt to take something tangible from the final month of their tour.

"It's very, very disappointing for the simple fact that we have not won a single game this winter and we still don't seem to be doing enough to win," admitted Pietersen.

"To lose the series is horrendous, we lost the Stanford game, we lost the India Tests, we lost the India one-dayers, now we've lost the Tests here and it is horrible.

"I hate losing and to lose a series against the West Indies when I think we're a better side or at least should be a better side - it's not good enough really.

"A couple of hours of silliness in Jamaica cost us. If we'd have got away with a draw or a win then we could have really turned this series on its head. It wasn't meant to be and so it has not been a good couple of months."

England will attempt to bounce back from that series setback on Sunday, when they play a Twenty20 International before the start of a five-match one-day series.

If they really are to gain some momentum before this summer's Ashes series, the time is right to start now and Pietersen admitted: "I think we're going to have to go out there with an aggressive approach because we haven't won a game this whole winter.

"We've got to go out there swinging and playing some good positive cricket. We're going to have to do something because I'm not sure I want to be here another month if we don't win a game."

Following Australia's impressive comeback to win their current series in South Africa - having lost at home to the same opponents - England have just over four months to claim some momentum of their own before the Ashes begins in Cardiff on July 8.

It is a situation which has already alerted Pietersen and although he concedes England are struggling for results at present, he is convinced the Ashes series will be closely contested - no matter what happens over the next four months.

"I've been asked this question before about momentum and I said that Australia don't exactly have any coming into the series either and then they've just gone and annihilated South Africa 2-0, so they now have it and we have no momentum," he added.

"I do still think that the Ashes this year will be contested very evenly and it'll be a huge series because both teams are at a stage where anything can happen."