I received an email from Penny, who is in Port Isaac, watching filming unfold. This is what she wrote (including possible spoilers):
"I'm in Port Isaac for a two weeks holiday and I saw the film crew yesterday. Something spectacular is going to happen; Doc Martin was screaming his lungs out on a ladder ;-). The fudge shop keeper told me this morning that next Tuesday and Wednesdag they will be using his shop again for filming some Mrs Tishell scenes. I'll try to make some pictures again!"
Thank you Penny! We look forward to any more information you may find!