is this actually legal?
i mean you sign a contract for work... i dont see that an employer has the right to place clauses on you for the rest of your life...and expect you to upheave your life to come to their aid whenever it suits them ...a contract is surely only valid for the time you work there.
it sounds like they have added an unenforcable clause here.
i would look into that, they may not be able to force you to attend... i suspect they should never have added it to the contract.
in terms of expenses, they should pay EVERYTHING.
Not only is this a pretty cheeky clause to add, to expect you to be out of pocket for it is a joke.
I would just tell them straight they pay for all your expenses or you dont go... that you re retired and simply cant and wont foot the bill... also tell them you have a terrible memory and will be of no help whatsoever to them...
could you do this by remote camera? record a statement or something, or even webcam?
i was witness to an incident years ago and was messed around by them so much that when i suddely got yet another letter about 4 years after it happened ordering me to travel to bradford, i was pretty peeved and told them i couldnt remember anythign any more, due to medication, and i would be no use to them - and they cancelled it.
dont know if thats why of course, but it was mostly true...