What biplane is this a model of?
The plane is probably modelled after both a Sopwith Snipe and a Sopwith Camel. Look at the cutout of the wing above the pilot's seat. It's rectangular as on the Snipe, not a semicircle as on the Camel. The engine looks like a Camel's however.

So, this model is possibly a hybrid of two famous World War I British fighter planes.

It could also be a specially modified Camel according to @Michael Tracy (except the painting scheme does not match the one on the picture he provides).