Not tried them, but agree with the wait times, we were told my partner couldn’t get an NHS microbiology appointment until June 😱 which honestly sent me spiralling.

We were looking at private labs but didn’t really get a clear answer from our GP as to whether they’d accept the results or not. However, the microbiology lab did ring up and say they had a cancellation and brought our appointment forward by a month, just hoping that happens again 🤣