How can I find my missing friend Elizabeth Kay who disappeared in Thailand?

first of all, you need to call the none emergency UK police +44 101 , create a crime number/log, then you'd contact missing persons hotline +44 116 000 plus her local news paper/embassy. I would also fully scan facebook for anyone who knows her, or any possible local facebook groups maybe if shes from a certain village/town. Seems odd for an 89 year old lady to be going around alone? (although she looks fit and healthy), you should also check Thai hospitals although that will be difficult without a Thai speaker plus which city.

The UK does deal pretty well with missing persons, after x amount of hours we generally will go all out and locate people, I think we say its 48 hours before the police will declare it a proper missing case and start scanning, then again as she is elderly that might be less.

No one has seen her since December. You should report it.

I hope she's well

Dont know if this will help but if you contact her embassy, they can find out if she has left thailand , through immigration. Perhaps she had trouble re entering on her border run with all the new daily rules being enforced. I hope she is ok.

Best of luck in locating her. I hope she is OK

Thanks for posting.