Hi Guys, yeah, I'm really sorry but I totally forgot to let you know how I got on!
Well as above I posted it off on Friday 27th Jan (1st class recorded).
I then rang them on the following Monday (30th) to confirm they had it, which they did and a very helpful chap informed me they were running approx 1 week behind due to Christmas. He told me not to worry, and that once it had been looked at, someone would be in touch one way or another.
Well, no one ever did get back to me, but on the following Wednesday (8th Feb), a brand spanker landed on my doormat
So all in all I'm chuffed to bits.
Overall the whole process took 9 working days (not inc weekends), and if you take out 4 of those for Royal Mail / Parcel Farce then you have a very good turnaround time!
Excellent company, with great CS.
Hope this helps some folks feel a but more reassured if anyone has any issues with their kit etc!