Record breaking contact

The first UK amateur radio contact on the 241 GHz (1.2mm) band took place on Friday, Feb 19, 2016 at 15:00 UTC  between Roger G8CUB/P and Chris G0FDZ/P in locator square JO01EP.
The distance was 30 metres and the CW signals were 559 and 589. The transmit power at each end was in the order of one microwatt and the antennas used were 250mm and 300mm dishes.
This contact has been made on the highest frequency allocation available to amateurs in the UK.
With signal to spare both ways, an attempt was made to increase the distance to over 50m but with deteriorating weather likely, a decision was taken to limit to 30m as antenna alignment was taking a very long time to achieve.