This question may come from the saying how longs a piece of string, but,

What sort of mileages are you getting from the front and rear pads, I have covered 18k taxi miles since mine where both changed and I am hoping to get it to the next service at 20k without replacing them beforehand

Not comparable, but I did over 95tkm on my first set before I changed to EBC premium discs and Greenstuff pads.

Discs are still in very good shape, hardly any wear and the pads in front were still over 40%, the rears over 30%.

But I only drive long stints (mostly autobahn, although at higher speeds I dont have to brake that much) and almost no citydriving.

Car is a VRS which has the bigger brakes.

I'm just coming up to 70k miles on my original pads.

43k and no problems yet

Taxi miles is the clue here. Lots of stop/starts.

Mid 20's would be my guess.

I did 72,000 miles on my original pads, fronts still had a good few thousand left but the rears were down to the metal.

67K miles and still on original pads/disks.

20K on the fronts and 25K on the rears and discs as well with my MK1.

Mk2 still ok with 27K now

I chose to change mine (front and rear) at 38K as they were getting low but probably had another few thousand left.

90K on my original ones, still going strong

I changed my front pads at 18,000, fairly hard driven commuting in/out of London daily, miles for Ferodo DS2500s (to get better stopping power).

The OE ones that were removed were about half worn, so ought to have been good for 36-40,000 miles. I am expecting, from past experience, the Ferodos to last a little longer.