Thinking about getting a new Vauxhall? This month may well be the best time with GM offering customers a further 500 for buyers on a new vauxhall.
Luton Vauxhall retailers will be hosting a Sales Event this May with great offers for customers, including a 500 gift card* with selected car or van purchases. The Sales Event will take place at Vauxhall retailers nationwide on the weekend of Friday 13th May to Monday 16th May.

As far as I can tell though, the Viva is not included in this offer


http://motorforums.co.uk/blog/2016/05/10/vauxhall-tempts-buyers-with-500-gift-card-at-sales-event/