On 3 Mar, 16:50, Michael Hoffman wrote:
But they have already stated publicly that they
will not refund or exchange current Savers.

I wonder if they simply cannot reliably distinguish counterfeits from
real tickets. If so that's unfortunate. I think giving people up to
June to use them up seems reasonable, though there may be one or two
people with large stockpiles to insure against possible fare rises or
something of the sort.