I'm pretty sure that I remember that old t and t+ tickets are always valid. Is that still true? Can I just use them in the turnstiles or on buses or do they need to be exchanged, or are they bin-fodder?
The t+ ones look modern and are white, the t ones are the same size but purple.
BTW- what is the "+" for in t+? Can you go further than the old t?
I have a half dozen of each so it would be a waste to just bin them....