It was quite nice to hear the controllers do it but to be honest it was often read far too quickly (comes with the territory at LHR I guess!) and I am sure that some overseas crews struggled to hear it sometimes, the new system is very clear and at about the right pace. I am sure it's a chore that won't be missed in the tower.
Any chance of a nice female voice like they have up the road at Luton to make it sound different from STN, which we also copy every time we fly in LHR. Perhaps we could even have celebrity voices from time to time!.