hi
you will need to apply for a 'pet passport' under the p.e.t.s scheme.
microchip
rabies vacination(we do two)
rabies titre bloodtest (30 days after vacine)
when the results of the bloodtest have come back(with an acceptable titre) a passport will be issued.
you will be able to re-enter your country from 6 months after the bloodtest.
it is important to keep the rabies vaccination up to date,as if even a day late,the passport is invalid,and you have to start the whole process over again
good luck