I an informed that orders and advance orders made online at Amazon.co.uk qualify for inclusion in the UK Chart. That said, the people over at Kirsty's website are cautioning that large individual orders (more than 3 copies at a time) may be disqualified as this may be interpreted as an attempt to "rig" the chart.
Advance orders made before the release date (December 19th) will be counted as sales on the release date itself.
There may also be outlets other than Amazon which qualify for Chart
calculations, I'll post here if I find out.

