Merge pull request #438 from jonezy/development

special offers page was broken.
[Retailer Site] Book A Test Drive keeps asking for Retailer when
submitting. Added hidden RetailerNumber.
Merge pull request #439 from tonyrd/development

URGENT FIX. [Retailer Site] Book A Test Drive keeps asking for Retailer when
live copy of the db

Signed-off-by: Chris Jones <chris@jonezy.org>