People will be able to explore the historic sites of Harrow as part of a national heritage festival this weekend.

The eleven historic sites will be throwing open their doors for free as part of the Heritage Open Days Festival from tomorrow until Sunday.

One building opening its doors will be West House, Pinner Memorial Park, home of the Heath Robinson Museum, on Saturday September 13 from 11am-4.30pm.

People will be able to find out more about the illustrator who lived in Pinner and his designs for ingenious and unlikely machines.

Visitors will also be able to sample the delights of the Heath Robinson style tea-making contraption built by the Heath Robinson Inventors Club at St Helen's School, Northwood.

Science teacher from the school Mr C Le Bas said: "It might be easier to make a cup of tea in a more conventional way, but it wouldn't be half as much fun.

"The contraption developed over several months, with the girls drawing ideas, finding odds and ends and testing various parts, working out what could and could not be done."

"The wonderful thing about Heath Robinson is that his drawings link together so many areas of study such as art, engineering, physics, design and technology, and even history."

Other Harrow sites open for the Heritage Open Days Festival includes Bentley Priory, Harrow School and St Anselm's Church in Hatch End.

Open all weekend will be the historic Headstone Manor, in Pinner View, which dates back to the medieval period and once belonged to Henry VIII.

Harrow Borough Council has announced it will be offering people free access to the sites, which would usually be closed to the public.

A full list of the buildings which are included in the festival and their opening times can be found here.