Argon

Original intended GUCCC pairing with motor no 5 Algol.

1948: passed to BW on nationalisation

1965: sold to Birmingham & Midland and re-registered at Birmingham as Barbara, but the name had reverted to Argon by 1968. 

Believed still with B&M as an unconverted butty at the firm’s demise, not certain what has happened to it since then.