Two things to ask about:

When I pressure wash the tailgate water seems to get in somewhere either at the bottom or maybe the top, anyone else had this?

Also, when I fill up the screenwash tank I seem to get quite a lot of water dripping out, it can't all be spillage.
I fill it up to the top, is there an overflow?

Oh, a Happy Christmas to all you FL2 'ers.

In recent heavy rain I had water ingress from the top of the rear door on the passenger side.

Being looked at today at local dealer

No windscreen fluid reservoir observation as yet 07 RRS Java Black

Ex - '56 FL2 SE TD4 manual, Narvik Black, Tinted Glass, Cool Blue LEDS Internal and puddle/wing mirror lights. Smoked side repeats. Genuine Imatation Walnut facia

The tailgate leak is probably the seal on the high level brake light cum screen washer, it has been reported before with a dealer fix using sealant