|First appearance||25th October 1971|
|Last appearance||27th October 1971|
|Number of appearances||2|
|Played by||David Garth|
Frank Cotsen was a solicitor who represented Jerry Booth when he appeared in the Magistrates' Court on a charge of assaulting Jim Stoker. In this instance, Jerry was found guilty and given a conditional discharge for twelve months. In between the gaps in proceedings, Cotsen and his opposing number, Mr Sanderson, were on the best of terms and chatted about mutual friends while an aghast Jerry watched on.