Update.

My luck prevails me. I was just getting ready to set off on the ride to Plymouth from Matt's house. Everyone has gone to work and I'm left in the house alone (it's nice that people can be so trusting) Then there's a knock at the door. I know Matt's expecting a parcel so I open the door and see the postman standing at the bottom of the driveway. Without thinking I walk towards him... and then calmly sign for it whilst safely in the knowledge that when the door just closed behind me I am now locked out of the house with no shoes on and no phone. Thankfully his neighbour came to the rescue. I'm very grateful that neighbour's have keys to each others houses around here!