That's actually fraud mate if you try to sell it and make out it's correct .

Stamp it with your own stamp [non ford or whatever, or just write in the book and keep receipts for the parts]. Not many people care if the last few stamps on 5 year old cars aren't main dealer.

9 times out of 10 whoever is buying a car of that age isn't going to be taking it to a main dealer to get it serviced anyway.

If you're selling it, it will make fuck all difference to the price as a private sale.

If you're part exchanging it at a dealers, you'll still get bid in the nuts for it whatever's in the service book.

So it serves no purpose to you really.