How can we repair our caravan floor?

It's a Fleetwood Colchester which we bought preused and it looks like it has had floor delamination repair done in front of the sink/cooker. This section of the floor is higher than the rest, it has 'bowed'. Can we cut out the raised section of the floor and replace it and if so, how do we do it, how do we fasten down the new flooring?
Any help would be very much appreciated
Viv