Stagecoach is planning to provide Contactless payment for all it's UK services. Contactless payment has already gone live on Stagecoach's Oxford services.
The new ticket machines have been installed on 180 buses currently in service in Oxford. The ticket machines also accept Apple pay and Android pay. Stagecoach predicts that contactless will be available on all 7,200 buses it has in the UK by the end of 2018.
More info here: