Hi Gerard, welcome to the site. If you go to the BMW website print off the uk dealers page, then phone them starting in the North and working down. Leave your number with the dealers and I'm sure you will get one quicker than May. There are always cancellations due to people's circumstances changing. Dealers remember you if you have distant accent and it works in your favour. I did similar to source a limited edition GSA and Vines in Guildford sorted me out.
Beavis on here just jumped a 14 month waiting list to get a new RS from Ford cause of a cancellation. He's now wearing his baseball cap backward and listening to the Beastie Boys full blast, lol. Cracking car though.
All the best in your search, I hope it happens for you.
JimmyMac