I still don't see a good enough reason for 'home brewed' approaches in actual IMC conditions. In the U.K, how far are you ever away from somewhere with a 'proper' one? Not far I'll wager.
I'm all for using them for training since students find them far more relaxing and less pressured than an full blown procedure at a major airfield, allowing them to concentrate on their flying and awareness rather than worrying about complying with ATC, basically if you stuff up only the IRI will notice!
In this case I whole-heartedly agree with FFB's comments about this.