I took up Boddles suggestion and wrote to Helen Hayes and she's been very helpful. She's got me a letter of apology from the PO, which means at the least that they've been made aware. They, of course, are blaming it all on the current crisis, which we can understand would be disruptive. But they aren't admitting (or indeed mentioning) the closing of Sylvestor Rd and the obvious disruption this caused. Presumably badly planned and executed.