2 for 1 vouchers for London attractions, or buy in advance?

A question about : 2 for 1 vouchers for London attractions, or buy in advance?

Hi - I hope I've found the right thread for my question. I'm planning to visit London for a couple of days this April with my husband and daughter (12) and since we're going on the train, I've found some great 2 for 1 vouchers to save us money on attraction tickets. But I'm wondering now if it might be better to buy the tickets at normal price online instead, because I can envision scenarios where we show up on the day to purchase tickets and are told they've been sold out. I didn't have any problems using a voucher at London Sea Life a few years back, but I'm worried about getting into other places.

We particularly would like to see the Sherlock Holmes exhibit at the London Museum, and the Tower of London. I have 2 for 1 vouchers for these, plus another for the mummies special exhibit at the British Museum. I know for a fact that they limit the number of people allowed into those kinds of exhibits; they give you a time slot. That one isn't as important to us as the first two though, as there's a whole free museum there to see anyway.

Anyone have any experience with this? Thank you.

Best answers:

• Thank you so much for all this info, p00hsticks! I would not have known otherwise. xx