Location

For a map of the location, please follow the link to Multimap.com or to Streetmap.co.uk.
If you have an ordinance survey map, the grid reference is SU966779.

Which Building

When you actually get there, you are looking for the building that looks like this:

Car Parking

Use the car park indicated on the below sketch: Please use this in conjunction with one of the maps linked to above. The car park is basically down Common Lane, a fair way down, on the right. Common Lane is the road off Eton High Street on the same side as the School Hall (the WMSO concert venue), and just to the North of it (the Slough Side). There will be plenty of other cars doing the same thing, and probably People directing you too.