For almost 10 years you may come to France and all the continental countries from UK and come back !
Regulations have changed on the 1rst of January of 2012.
What you still need is to have your pet microshiped, vaccinated against rabbies from at least 3weeks AND to go to a vet to have your animal treated against tapeworms by a registered vet surgeon..
This has to be done within 5 to 1 days before you leave France.
What you don't need anymore is to do the blood test (to see if the vaccine against rabbies has produced enough antibodies caus' it always works !) and to wait 6 monthes before you leave UK.
Treatment against Ticks is not required anymore( but still recommended).