Nazi's final wartime message blocked by Milton Keynes codebreakers is revealed for the first time

GCHQ, the successor of the Bletchley Park team, published the messages and their translation.

They came in the final stages of the war, while the Park's codebreakers were continuing to monitor German communications until the very end in case there was a final attack from the defeated Nazi forces.

On 7 May 1945, the day before Germany’s final surrender, the first message was sent at 7.35am by a military radio network making its final stand in Cuxhaven on Germany's North Sea coast.

This German military radio network, codenamed BROWN, had extended across Europe sending reports about the development of experimental weapons. It was used by the Nazis to co-ordinate new weapons they were developing even in the dying days of the war.

It was using its own cryptographic key through the famous Enigma machines, which Germany used to encode its communications. But Bletchley Park had managed to crack this in 1940 and could listen in on what the Brown Network's operators were saying to each other.

The May 7 message was easily picked up by the Park's workers 500 miles away.

It states: 'British troops entered Cuxhaven at 1400 on 6 May – from now on all radio traffic will cease – wishing you all the best. Lt Kunkel.'

Shortly afterwards came the final communication. It reads: 'Closing down forever - all the best - goodbye.'

GCHQ historian Tony Comer said the transcripts provide an insight into the "real people behind the machinery of war."

He said: “While most of the UK was preparing to celebrate the war ending, and the last of the German military communicators surrendered, Bletchley staff – like today's GCHQ workers – carried on working to help keep the country safe.”