Late, but they are very accommodating with their ice! As funny as that sounds, it's hard to get a cold drink in London.
The bat ?? Ha!!
The bar however I think is open until 1.00 am.
I didn’t use the bar I’m sorry but give them a call the receptionists there are very helpful
I'm not aware as I did not spend any time there. The restaurant closes at 10 pm and the bar remains open past that time, but I don't know just how late they stay open for drinks.
Get an answer from Lancaster Gate Hotel staff and past guests.