No. Pepper [OC] spray and other disabling weapons that use chemicals to cause harm to persons are forbidden. These include Mace, teargas, acids, and animal repellent containing OC spray.
If you have these types of weapons leave them at home.
It is a criminal offence to possess these weapons at airports.
Possession of disabling weapons is an offence punishable by a term of imprisonment and may result in:
You will be asked to relinquish all dangerous or prohibited items found in your carry-on luggage. If you refuse:
We x-ray bags going on planes to make sure there is nothing dangerous in them. If something comes up on the x-ray that needs checking, the bag will be opened, searched and any dangerous or prohibited item will be removed.