Any idea what this is?

[spl1970]

Looks like some kind of test track, just south of Bedford in the UK.
52 02' 39.84"N 0 34'02.97"W

[McMaster_de]

Look at this file:

http://www.googleearthhacks.com/dlfile12676/Car-Test-Track-near-London.htm




Millbrook proving ground in Bedfordshire has rather less open space, but provides a range of progressively challenging closed road environments for further testing and honing of your high speed handling skills. In particular the alpine hill circuit is a magnificent manifestation of a road that contains almost every conceivable type of medium speed corner to challenge your vehicle and your self control. The high speed bowl is capable of accommodating the maximum speeds of most vehicles.

Millbrook is the chosen venue for developing an awareness of car control in relation to restricted environments such as road and track and it is the place to explore the qualities and the limitations of your car. You will appreciate Millbrook rather more if you already have the basics sorted out and you aspire to develop your skills to the highest level.

[spl1970]

Thanks for your help.