It's a legal requirement to retain business records - like purchase invoices and receipts - for six years or so after the end of your accounts year. This used to be pretty straightforward when we all received all of our bills on paper. But these days, lots of businesses supply us with electronic bills, and increasingly those businesses don't actually send them to you, but invite you to download them.
The problem is, the opportunity to download them doesn't always last for ever. BT bills, for example, only stay online for six months. If you've not downloaded them by then, they're gone. So, download them. It doesn't matter if you don't print them out - we run a pretty much paperless office ourselves - but save them somewhere secure and backed up.
Right, just going to download all our phone bills now!