Well, I've just discovered one culprit of this incident is a £105 one off clean. Emailed her earlier regarding late payment and got a response saying she'd sent payment by cheque already.
I've emailed her my bank details for a direct transfer, which she said she'll do once she confirms the cheque has been cancelled.
It never bothered me in the past stamping the envelopes, but now they have the option of GoCardless which is far cheaper for me to use, I don't see why I should pay 53p a time for collection.
I was spending at least £600 a year on stamps, that's an extra trip to Center Parcs with the family each year.