The UK training fleet does hang together more precariously at some establishments than at others, one might say...
But, hey, it's all G-reg and maintained by properly licenses JAR145/EASA companies so there is no case to answer, by definition.
I had a few things go wrong, the most inconvenient being a radio failure while in a very busy circuit. Bought an Icom the next day (with a headset adaptor) and have carried it ever since.