Two points:
-if you're not in a rush then wait for someone to do an offer (for example in March 2017 someone did £99 inc vat and grant)
-consider whether a 2nd charger at a relatives house may be more useful. Change the address on the V5 and get a bank statement sent there and noone will question it. I have a unit at a relatives house which is very useful (others may have ethical concerns here)
-if you're not in a rush then wait for someone to do an offer (for example in March 2017 someone did £99 inc vat and grant)
-consider whether a 2nd charger at a relatives house may be more useful. Change the address on the V5 and get a bank statement sent there and noone will question it. I have a unit at a relatives house which is very useful (others may have ethical concerns here)