The bottle I thought was cheaper, aint, I thought I was getting a 20ltr but it ended up a paltry 10ltr, so bollocks to that....
So I've signed up with EnerGas in Grimsby, for a 20ltr bottle, hoping to collect it tomorrow...
Pure Argon is £58.38inc, then £7.20inc per month rental, I'll pay a years rental in advance, still cheaper than the non-rental ones I found...