Still not finished. We've left the walls to dry since last Saturday and done nothing. Carole left for work this moring at 7am and I spent an hour before I started work sanding down the areas that had 'bobbled' and washed down the dust and dried the walls. At 12pm I took 40 minutes lunch and basically rollered the 2 walls you can can see, to the front and to the right.
The paint has, thankfully, gone on really well with no bobbling and it is currently drying. It needs another coat, maybe 2, as where I sanded took it back to the original blue, but the offending wallpaper paste appears to have done one.
So pleased as the next option was bringing in a plasterer to skim the two walls.