Following a software update (no idea what it was... was just told that they updating something) around April, whenever the car is reading out the letters you select / draw for the postcode, it reads the last one twice.

Say the postcode was:
BR11DP

It would say:
BR11DPP

(the two P's being in quick succession).

I've noticed this with all postcodes, so it isn't just the combination of letters sounding funny or my having entered something wrong

I don't often use the SatNav so I can learn to ignore it, but still curious about what is going on.