According to BBC News the UK has secretly helped Israel develop nuclear weapons, by supplying them with heavy water - which is neccessary for this purpose.
This was in conflict not only with the UN but also the policies of USA at that time.
I don't think it is only the arabic world that will be outraged by this news in the near future.
It is probably like pouring gasoline on a fire, I think. You can only expect some kind of explosion.
I guess one of the more important reasons why Iran might be trying to get nukes is - Israeli nukes.
This irresponsible act by UK probably makes nuclear proliferation more likely.