UK doesn't need boots on the ground. These speculations will make Russia think the UK has boots on the ground.
We know that Russia does not evidence to make decisions.
It wasn't gifted at all. It was paid for. The UK was broke at wars end. The payments contined for years after. Australia too paid for US equipment. As part of the agreement, useful equipment had to be dumped at wars end. Total waste of taxpayers money!
The explosions are obviously the ammunition inside the tank. I have seen videos of Russian tank design and yet I cannot see how the round from the drone can penetrate the armour.