There are a number of long-winded regulatory documents that you could read if you wish, but, provided you're travelling with up to 5 dogs and not for animal commercial purposes, you'll find everything you need on the Defra website: dog travelling routes. Here are the main principles you'll have to follow:
This shouldn't be a problem as it's already a requirement in the UK. If you have just got your dog, or haven't got round to doing it, your vet can do this, usually for a fee of around £10 - £15.
There is more information here: get your dog microchipped
You'll need a Pet Passport - again, your vet can issue this. The passport is effectively a recognised record of your pet's identity and its vaccinations, so when you go to your Vet you'll need to take your pet, its identity and vaccination records and any rabies blood test results (if you have them). Make sure that your pet's passport has all the following sections filled out:
This has to be done at least 21 days before your date of travel so make sure the vaccination is up to date.
This has to be done from 1 to 5 days before you return to the UK. The treatment has to be certified by a vet in your pet passport under Echinococcus treatment, with both date and time recorded. Your dog can be put into quarantine if you don't follow this rule so it's an important one. We can help you find a vet near your villa if you wish.
Lastly, you can only use certain routes and companies to enter the UK - you should check them here: Approved Sea and Air Routes for Pet Travel
It's worth checking as, at the time of writing, EasyJet does not transport pets or animals in the hold of their plane. Ryanair does, as do British airways.
Most Ferry companies seem to and the Eurotunnel is also Pet friendly. And probably the kindest way to transport a pet as you get to stay with them.For more information on looking after your pet when you travel, have a look at this RSPCA factsheet.
And that's it:
Finally, you have to find out where to stay - have a look at our selection of villas in Italy and France for your dog friendly holidays