Steve if you are looking to re-gas, shop around.
I managed to get a re-gas done for £20 +vat a couple of years back at a local garage.
A recent re-gas i managed to blag free from an audi dealer as they hadn't spotted it needed it on a service
It only takes the time for them to have a mug of tea & is hardly rocket science to do
BUT please don't ever leave the climate control on Econ for a period of time.
It's totally false economy