Thompson takes over the entry occupied at Knockhill last month by Rob Huff and will see out the season this weekend at Silverstone and next month at Brands Hatch.
Reigning Jack Sears Trophy champion Thompson starred in the first half of this season, qualifying fourth at Oulton Park, but was forced onto the sidelines thereafter when 2020 JST title winner Michael Crees brought a budget to return to the BTCC.
