Co-ax V 300 ohm flat twin.

[Terry]

That sounds like bad planning somewhere unless plans for the transmitters on both sides of the North Sea were being made at the same time with neither team having any idea of what the other was up to. However, Tacolneston is well to the North East of its service area so power to the east would have been relatively low, anyway. Was the other transmitter at Goes in Zeeland, I wonder? That is right on the south-east corner of the Netherlands, so many aerials directed at Goes would have also been directed out across the North Sea beyond!

Mendlesham was also HP and was also on Ch. 11, co-channel with Chillerton Down.