As FFF said, I think the (or certainly a) problem is the lack of radar units willing and able to give you a service in the south east, particularly in the LAM/Stapleford area. I've been in solid IMC there with Luton and Thames declining to give a radar service and "out of range" of any LARS unit. So englishal is right that as a lowly IMC pilot I have a problem that *might* be solved if I was instrument rated.