That chart shows a month. It's been trending downwards anyway over the past year or so. No guarantee GBP will strengthen immediately after the pandemic either, especially with the aggressive economic policies outlined by our chancellor which probably won't do much to strengthen the pound, in the near-term anyway.
sorry about that. I think I misquoted you and intended to quote someone else. There was a specific date shown or the day highlighted I had seen was the current day. Either way my mistake.