Dave heads to Wales to bag a Sierra Cosworth, one of the most sought-after cars in the bidding market. Meanwhile, Dad Derek gets his hands on a more sedate 1926 Standard Tourer - a quirky little motor with a whistling dipstick.

Dave heads to West Yorkshire to collect a rare 1926 Dodge bus. Derek gets his hands on a rare Vauxhall Victor VX 90 police car that is expected to sell for more than a few coppers.