:) Carefull Jim, he reads this sometimes you know! I shall shortly be joining him for a pint so I'll ask him, although I suspect that it may be something to do with driving something that;
a. Goes the same way as the road wheels
b. Has the steering wheel on the correct side
c. Is able to be driven on the road while you can still converse with the other person on the footplate
d. Has a sensible roof that actually keeps you dry.

etc etc :p
Enough to turn most fowler men into a something that looks like it's just swallowed a goldfish I reckon!

A roller. Did have a picture somewhere......

The rolls and forks are still about but on different engines.

Regards

Matt