Trials of M&S food-to-go at branches of WHSmith are under way in Scotland as the joint project gathers momentum outside London. Some 33 "travel" branches of WHSmith at railway and bus stations, hospitals and airports nationwide now carry the M&S branded food-to-go ­ sandwiches and a mix of salads, sushi, bagels and wraps. The initiative is being rolled out on trial in geographical clusters nationwide. WHSmith and M&S plan to test the Welsh market next. A group of sites, based around Bristol, Cardiff and Leeds, will be launched in September. Any unprofitable areas will be removed from the test. WHSmith marketing development manager Catherine Lister said: "Both companies are very pleased with the unique offer." But there are no plans to add M&S sandwiches to WHSmith's high street offer, said Lister. She said focus on the M&S project will remain on WHSmith convenience type or travel stores as customers on the move are likely to be tempted by sandwiches when they stock up for a journey. As the two retailers develop a strategic alliance, WHSmith's news wholesaling arm has started supplying newspapers and magazines for M&S's two pilot convenience stores in south London. {{NEWS }}