London Pass, advice needed for family Christmas holidays

[xavierr]

Hi everyone!
We're heading to London next week with our two children (8 and 12) to enjoy the Christmas holidays. I know it's a bit last-minute, but we really want to see the Tower of London, London Eye and Westminster Abbey (Harry Potter Studios seems already fully booked for our dates).
I'm hesitating between different passes for these attractions. Given the festive period, I'm wondering if fast-track access is really worth it? If any of you have tried different options recently, I'd love to hear your feedback, especially for this particular time of year!
Our max budget is £1200 for the family.
Thanks in advance for your help!

[NomoneyNohoney]

Hope this link is of some interest to you. The two for one tickets seem to apply to Tower of London, London Eye and Westminster Abbey.
I seem to recall I found leaflets at my local (departure) station that explained everything although the website gives fuller details.

https://www.londontoolkit.com/whattodo/ ... ttractions