Only by looking at your certificate would you be able to tell. One issue with Ridge Hill customers is that the digital is in groups B and C/D, whereas the analogue is in group A. Have you discussed the matter with the installation company?
There is an interesting issue in parts of Gloucester, Hardwicke / Quedgeley is one case. On a clear day you can see the transmitter, but the top two multiplexes can be 10-15dB down on the other four.
What were the signal and c/n or BER readings the engineer noted for you?