Mrs Fortescue is an elderly lady played by Jean Anderson. Her sister is married to a baronet.
Driving Mrs Fortescue
Mrs Fortescue asked Hyacinth and Richard for a lift into town as her chauffeur was indisposed. Richard remembers her attacking him with her walking stick. Later on Daisy and Rose drag her into the pub where she enjoyed a drink and a game of darts.
You have very interesting relatives, Mrs Bucket.