A week on, all change. Having spent the last 7 days a tad disappointed - it is now all systems go!
As from yesterday afternoon, one gilt is bagging up. The back teats have dropped significantly. The other is looking much the same but her belly line is lower.
The due date would be Monday so we are now working out where to move her too and getting it all ready.
Visited the breeder who spent her working life as midwife to 450 sows

Lots of advice

. Her gilt (litter mate to ours) is basically the same height, length and width behind shoulders. Hers is leaner, but was put in pig early Aug. Have shown some pics and she reckons our gilts are fine, yes a bit big

but she thinks some of it could be down to litter size - the gilts sow had gigantic litters,usually 14 or 15.
Skates on!