Ecurie Ecosse have been forced to withdraw their entry for this weekend's Total 24 Hours of Spa after being unable to secure the necessary extra sponsorship for the endurance race at the famous Belgian track.

Last year's Spa 24 hosted Ecurie Ecosse's return to international racing, before continuing into full season campaigns in both the Avon Tyres British GT Championship and Blancpain Endurance Series championships with a Barwell Motorsport prepared BMW Z4 GT3. However, their entry into this weekend's race – the fourth round of the Blancpain Series – was dependent on securing extra sponsorship.

“For us 2012 was always going to be about building relationships with our partners including Barwell, our sponsors and BMW Motorsport,” said Andrew Smith, one of the team's BES drivers. “It is a shame not to be at Spa this year, but equally it allows us to focus on our British GT campaign and the remaining Blancpain 3 hour events, and we hope to be making some exciting announcements about our plans for 2013 very shortly”.

The team are already winners in the British GT Championship, triumphing in the opening round at Oulton Park. Drivers Oliver Bryant and Alasdair McCaig lie fourth in the points standings after six rounds of the 2012 championship.

The team currently aims to expand their entry in the championship to a two car campaign for the 2013 season, and is already working towards making a return to the Spa 24 Hours.