On the recent demonstrations in london, I am wondering if as a counter measure against the hourses I could hire a camel for the day. Its not the actual hiring of the camle that would be the problem. I can handle that. It would be would it actually work or would the trained horses take not knowtis of the camels or what would happen. (Please don't reply about what the police would do. I want specifically if it could in theory work against the horses.)

I want specifically if it could in theory work against the horses.
Nope, not a hope in whatsit.
Police horses are specifically trained to deal with crowd control, so some idiot on a camel isn't going to put them off.