Thank you very much indeed Wrider. That's a very generous gesture, I'm humbled.
The comment wasn't aimed at you at all, as you paid the correct price.
I have decided to pay for all the postage online. They advertise the prices and then it's something different at the checkout.. Cheeky!
It's actually super cool as they give you a label to print and the postman even collects it from my home in the morning.
An another fing; I'm using re-cycled jiffy bags that I've accumulated until I have to use the ones I bought. Please excuse the odd scruffy one!