If you absolutely must send something on a Bank Holiday, you have three options. First: use a post box. Yes, the red one on the corner. It’s open 24/7, rain or shine. Drop your letter in and hope for a pickup the next business day.
Second: eBay sellers, listen up! You can buy online postage (like Click & Drop) and print labels at home. The mail still moves—sorting offices operate on a skeleton crew. Third: accept defeat. Put the envelope in your bag for Tuesday. Your recipient will survive the 24-hour delay. I promise.