[Elecraft] N6KR's 4 MHz oscillator cal method for the K2

[Stuart Rohre]

I would think some of the WWV frequencies would come thru in UK quite well
when the bands like 20m are open.  Try the 15 MHz and 20MHz frequencies.
Try the 10MHz one in the wee hours of the morning U.K. time.
-Stuart
K5KVH