Thanks Mad Scan went well but I've had no internet access all weekend as I've been camping in hurricane Bertha 
All was well with the Prulet, at the scan - it was a real fidget though so they couldn't get all of the measurements which means I'll have to go back for a rescan in two weeks which is a bonus! Saw it yawn really animatedly which was utterly spellbinding.
They found I have a low-lying placenta; there was some panic confusion as to whether it was covering the ostium or not but they confirmed today that it's just touching the cervix so there's a good chance it could move. They've booked me in for a scan at 36 weeks (loads of scans - yay!) and I'm feeling positive either way.
Visit to the birth centre was very worthwhile, no unicorns but it seems very patient(mother)-oriented and progressive which is hugely appealing.
Had my consultant anaesthetist appt today too which was also a very useful and reassuring experience.
And in final preggo update news, I bought my first maternity jeans today, these ones from New Look. I was very impressed with the quality and fit, very un-New Looky in that respect. So comfy and look really flattering on. They do them in loads of colours so I'll probably end up with more!
Apologies for me me me post, I'm off for a good read of the thread and catch up of everyone else's weekend....