We have heard from the caretaker at Cotteridge:
Just to let you know that we have been given notification that National Grid intend to complete the gas works in connection with the bungalow refurbishments on the weekend of 24th - 25th June. Most of the work will actually take place in the road outside the main entrance, but we have no way of knowing (despite many enquiries) whether access to the carpark will be restricted, until the men are on site. We expect that pedestrian access would remain possible through the side gate in any case.I thought it best to warn you that parking might be a problem for your group on Saturday 24th, although last time when they did work all the way up the entrance car parking was not impeded.
I will update if we hear any more