If you contact the passport societies who have the registrations of them with a letter asking them to pass on your details to the new owners as soon as they update the passports. If you don't know who they are registered with, use nedonline.co.uk to find out. Two Tone Tonto is definately on there as I just did a quick search but didn't have time to search for the little chap.
We are in North Somerset and go to shows most weekends so will keep my eyes open for you.
That's awful. Sorry I'm not in your area so can't really help much. Can't you just talk to your mum and hope for the best? Not that it's any of my business but if all you want to know is if they're safe I can't see why that would be too much to ask.
If it was me (my mum has no idea bout horses so it would be very impossible for her to do anything like that ) id just want to no they were ok, not to try + get them back, just to no they are safe + sound
I'm really sorry you are having to go through this,as a mother I cannot understand the attitude of your mum.Not saying I condemn her for selling them,there could have been many reasons for that including financial if you weren't able to have them anymore,but the attitude towards you and disregard for your feelings is rather a shame.
Hope you can find out about them,maybe loki sofi will be able to help.Would have thought the appy would stand out and be easy to trace,he's lovely BTW