The simplest way to re validate when you are in Europe is to forget the experience route and just arrange for an LPC even if you don't need to do it.
An EASA examiner gets approval to do the test and endorse your licence.
He then sends the paperwork to the CAA.
It is really that easy.
OK its a test you don't have to do but its better than letter the rating expire, get into arguments with the CAA etc.
Of course it helps to get your ducks lined up well in advance of the rating expire and not leave it to the last moment.