On 26 Feb, 18:44, Michael Hoffman wrote:

Can this be legal? If there was never any indication that the Bus Savers
could expire, then it seems like it would be a violation of the Unfair
Terms in Consumer Contracts Regulations.

You could always apply to TfL to have your tickets refunded or
replaced. Unless you've been stockpiling the tickets in order to
engage in some kind of scam, I don't see why they shouldn't agree to
do so.