Just before the start of the last race, it was mentioned that 43 F1 drivers had raced in the Touring cars. I can only name 3 and Johnny.

Nigel Mansell

Tiff Needell

Gabriele Tarquini

and of course today, Johnny Herbert.

Can you name any more?

Gianfranco Brancatelli

Slim Borgudd

Roland Ratzenberger

Damon Hill

Tiff Needell

David Coulthard

Jonathan Palmer

Christian Danner

Julian Bailey

Jo Winkelhock

Ian Ashley

Eric van de Peole

Gabriele Tarquini

Jan Lammers

Johnny Cecotto

David Brabham

Derek Warwick

Gianni Morbidelli

Nigel Mansell

Jean-Christophe Boullion

Thorkild Thyrring

Guy Edwards

Johnny Dumfries

stirling moss

Nice!!!

When did Hill drive in BTCC?

I think it was early 90's in a Sierra, just the one race though iirc.

Grahim Hill, Innes Ireland, Jim Clark, Jackie Stewart, I think Jack Brabham. It was actually pretty common for 1960s through about 1975 F1 drivers to drive F1, F2, and tin tops (GT and saloons) as often as not doing 3 or 4 more or less complete championships in a given season.