Had an email today from Amazon about the Canon Powershot promotion this weekend:
PowerShot A550 = £25 Cashback
PowerShot A560 = £25 Cashback
PowerShot A570 IS = £25 Cashback
PowerShot A720 IS = £30 Cashback
PowerShot A650 IS = £40 Cashback
Canon's link: http://www.canon.co.uk/powershotpromotion/
The A560 works out at only £67 delivered after cashback (£92-£25).
I phoned Canon earlier and they said the promotion covers cameras from anywhere that sources them from the UK.