I have received the following information regarding compensation and refunds following the problems last Friday.
Owing to a failure of the National Grid power supply affecting parts of England and Wales on the evening of Friday 9 August, GTR trains, using overhead power lines, came to a stand between Farringdon and Bedford on the Thameslink route and across the Great Northern route between London and Peterborough/Cambridge and Kings Lynn. GTR, Network Rail and Siemens Mobility, the train supplier, will be undertaking a review into the disruption caused on Friday evening.
The disruption meant that passengers were not able to use the service for the rest of the evening. The rail company confirms that they sourced buses, organised taxis and arranged ticket acceptance on other operators where possible. Tickets for Friday were also being accepted for travel from Saturday to Monday, and passengers are being advised to contact Thameslink or Great Northern with additional costs incurred due to the disruption. Details about this can be found at the following links:
https://www.thameslinkrailway.com/delayrepay
https://www.greatnorthernrail.com/delayrepay
If you were affected by the disruption on Friday evening please follow these details and claim your compensation.