I'm home based at EGFF (not south-east I appreciate) and my approx. £160.00 per month parking fees includes all landings and approaches, so I regularly call ATC for an IFR RV ILS to landing. 3 x ILS per month and I've broken even.
It keeps my hand in; instills stacks of confidence in passengers who may be flying for the first time as I explain it makes no difference whether I can see where I'm going or not and that this is how the big boys do it (except for absence of Autopilot); gives me a radar control service with its added safety factor; and whilst it does take a bit longer than a VFR arrival with circuit to land, the extra 10 minutes in the air is well spent keeping in practice.