does any one know the offset of these?
and tyre diameter?

wheel size is 7x 13 and the tyre size is 205 60 13, not sure of the offset but its not a great deal...i have a set of seven spokes at the workshop i will have a look for you at the weekend if no one else lets you know before then.

do you know if the offset is small enough to fit to locost with escort size axle? or will i still need spacers?

standard chassis? hmmmmmm i think you will find the wheels will hit the trailing arms...

Should be ET19 same as all RWD Ford alloys (bar the Sierra).
I've got a set of 4-spoke "Laser" wheels on my book chassis and they clear the trailing arms no problem.

Crapi 7 spokes and Pepperpots of the 2.8i are ET5. The will not bang the trailing arms because the wheels are further out, they may foul the rear wheelarch though. They just fit inside my Westfie1d arches

does £100 for a set of 5 seven spokes seem reasonable or are they available much cheaper?
Also did the pepperpots and sevenspokes come in other et's or am i guranteed an et of 5?

pepperpots and sevenspokes (2.8) are both the same offset, £100?? realy depends on ther condition.

£100!! They would have to be in perfect condition for that. I paid £40 and they are a bit tatty. I just sold a set of Pepperpots with racing wets for £40 and another guy on the WSCC site has a perfect set for £70