The price on this set is fairly high and so is the postage, somebody who wanted a set badly already has the one you just missed, they're out of the running for this one. I'm going to keep my bits crossed for you that nobody else wants this set as much as you do - at this price.
All you can do is sit at the end of the auction again, with a high bid (say £27.76) already placed in the box which appears with the "confirm bid" button on it, and watch the time ticking down.
I always stick an odd number of pennies on - it's been the difference between winning and loosing for me before.
At about 8-10 seconds before the seconds countdown reaches zero time, push the "confirm bid" button in the box. You will not outbid yourself, only the next highest bidder.
Until then you can keep watching it to see if anybody else puts another bid on in the meantime.
I do so hope you get it without any competition.