Grunff wrote:
For larger areas, polystyrene based filler works well. It isn't flexible, but it isn't as prone to cracking as plaster or cellulose filler.

http://www.toolstation.com/search.ht...iller&Search=1


The crack itself isn't massive - a couple of mms wide but runs the
width of the arch - about 30cms. Sounds like I might be best off with
decorators caulk, given the relatively small width.

Is One Strike Filler the same as Polyfilla 'No Sanding' filler:
http://www.polycell.co.uk/products/p...polyfilla.html
(It's basically very, very light, almost like egg white and can be
mixed with a little water if a bit dry)?

Michael