Postman Pat and the Surprise Present

It's Dr Gilbertson's birthday and the residents of Greendale are planning a surprise for their kind-hearted doctor. Pat, Ajay and Ted are busy renovating something in the garage, Julian and his friends are practising a song they've made up specially, and Nisha and Sara are organising the special birthday tea. But can they get everything ready in time before Dr Gilbertson discovers the surprise?