Apologies to the people who were calling me without success when I was on Billinge Hill, G/SP-017, yesterday afternoon. The receiver of my Wouxun KG-UVD1P was completely swamped and desensed on 2m by the commercial signals from the 4 masts on the summit, so I could only copy the strongest signals. 70cm was unaffected, but I could only find one station to work on that band.
I did manage 4 QSOs on 2m, including Brian G4ZRP on the Wirral. Thanks, Brian!
I have not experienced comparable breakthrough problems at any other site.