Power problem between Royston and Cambridge. One of the first impacted services was the 1721 London - Cambridge. Which I think didn’t make it to Cambridge until after 2030.
It was then London - Royston for most of evening
I was the ex 17:21, arrived at Foxton and got a contact signaller message who informed me of electrical supply problems in Shepreth Branch junction area, where two consecutive trains encountered ADD activations.
A decision was made to terminate me at Foxton, but did not want to detrain passengers quite frankly in the middle of nowhere; So I went back to Royston detrained & then was asked to reform as a late running all stations to London king’s cross service.
The middle unit on the 12 car 379 1707 LST - KLN service was the culprit, then a 1T50 1742 KGX - KLN 12 car 387 went and suffered an ADD & was placed in the ‘cupboard’ whilst investigations took place. 9S44 was wrong roaded from Shepreth branch junction which meant level crossing attendants were placed at Hauxton & Harston Automatic Half barrier crossings whilst the train continued to foxton to detrain some passengers, and continued onwards to royston to detrain the remainder whom didn't alight at Foxton.