I have one of the 'boxes full of fuses' you can get off Amazon... Rating 1Amp to 20Amp. Just another little box of things I have never used yet but might do one day.... given a few out though!!We had a Swift Select PVC that blew fuses whenever we tried to run the heating on 230v. After replacing three, supplied by the dealer, only to have them blow immediately we knew we were in trouble.
When on a site in Dumfries and it blew again I looked for a replacement. There were no motorhome/caravan dealers nearby so I tried a local, small independent electrical shop. I gave him a failed fuse and asked if he could “provide a 10 ampe fuse like this” . The owner took the fuse away and came back saying, “I thought you asked for a 10 amp fuse, this is a 1 amp” . (I think that was the rating, although I am sure others on the Forum will know the right answer).
Apparently the two fuses have similar colour bands for identification. We had no problems after that.