To say you don't like an upbeat British film this unpretentiously nice is like saying you don't like tea and biscuits.

There are sentimental elements, and not all the songs are top-drawer, but despite that the unlikely idea of having characters burst into song as they walk down the street or drink in a pub worked for me.

The flash mob finale, with what looks like 500 dancing Edinburghers, is about the most fun I've had in a cinema this year.

A convivial and well-shot musical that forms a narrative and articulates the variable emotions of its characters through upbeat, crowd-pleasing pop songs to varying degrees of success.