If anyone knows of any deals on this matting please let me know (30m rolls) I,m seriously considering yet more expense and opting for this.
3 Rolls should do.
Also a good "glue" to stick it down, one that will hold to a Anhydrite floor

imo you dont need a matting , your using porcelain tiles which will be fine on to gyvlon screed, i have tiled much larger floor area than yours onto gyvlon with out a matting using porc tiles with out any problems

What adhesive did you use in your installations?

ihave used both gypsum based and cement based , if the prep is right you will be fine imo

I prefer to use the matting, just my prefrence especially with UFU.

An Alternative to Ditra is Dural available from site sponsor PHG and I belive you would get a forum discount.

i allways use Ditra, Dural looks same thing, maby cheaper?