My brother got married in Tenerife last year but you can't officially get married over there without being a resident for a number of years, so they had a registry office do in London the day of the royal wedding, my brother had booked it before the royals did! They were then on million pound drop that day and won £25k.
Her dad has a holiday home in Tenerife so I think that helped in that he knew the places to go etc.