Finishing the junction at the mouth of the station, thought I'd try a new approach on the ballasting. For this crossover, I plastered the underlay with glue, then stuck the crossing down, poking the wires through the pre-drilled holes. Then liberally poured ballast all over, 'tamping' it down with a finger.
A few hours later and the excess brushed off it looks like this - not bad at all, no ballast on track, on the rails, etc, and very very easy! Will invest in a little hand held hoover methinks - but an excellent way to ballast points and crossings 'as you go'!