Your first paragraph rings true but in no way mitigates my not informing the council directly. That's my first mistake.
The second paragraph is wrong but I'm assuming that's what they think too.
There is nothing else to say on the matter really, aside from that I've received some very friendly emails, and some hard experienced advice that is in the process of being acted upon.
A lot of the time, NSC is what it is: a football forum stuffed to the gills with jokes, terrible puns and conspiracy theorising across all manner of things. Sometimes though you realise that it is also incredibly supportive and in a genuine time of need, invaluable, as we all know.
Thank you one and all.
Good. The main purpose of the interview is to establish whether this oversight is the tip of the iceberg so to speak, so be prepared for them to want to know dates & details going back years. They will cross check with DWP to see if any other benefits have been overpaid, so to work out the overall overpayment. In cases where you see fraudsters prosecuted, there are multiple benefits involved as they are all inter-linked, and that's where the overall fraud runs into several 000's. If this is solely a HB overpayment for £3-4k I'm pretty sure they won't look to prosecute, particularly if you offer to repay. Although the onus is on you to report changes to them, they know full well they've missed something from the DWP which could have avoided this so they would look foolish taking it further. Good luck.