Certainly.
The UK is estimated to have a stockpile of approximately 160 active nuclear warheads and 225 nuclear warheads in total.
the UK did some of its nuclear weapon test shots there.
The United Kingdom tested its first nuclear weapon on 3 October 1952.
The meaning of the word nuclear weapon, is a weapon that has a nuclear warhead on it.
The UK was the third country to obtain nuclear weapons, after the US and the USSR. The UK had its first successful nuclear weapon test in October 1952, a plutonium warhead similar to the one dropped on Nagasaki.
USA, Russia, UK, PRC, France, India, Pakistan, North Korea are known for having nuclear weapon. Israel probably also owns nuclear weapon but never officialy declared it.
This nuclear weapon is called an atomic bomb or a nuclear bomb
Nuclear weapon detonations
If by "bomb" you mean a conventional explosive weapon, then the nuclear weapon is more powerful.
The first test of a fission weapon by the UK was on October 3, 1952; but it was not tested inside the UK. The test was done off Trimouille Island, in the Monte Bello Islands, Australia. There have never been any nuclear tests inside the UK itself.
nuclear chemicals such as plutonium
No. LLNL even tested several Uranium-Hydride bombs in the 1950s. Even though their computer models said the devices should explode, none gave a nuclear yield. One could use the waste from the reactor as a Radiological Weapon, but the reactor itself is not useful as a weapon.