Depends on who pushes the button on the Nukes, but without those I'd have to say Britain..
Side note: There are no winners in a war.
Britain.
depends
The relations between Great Britain and their former colonies would be deterred.
Israel invaded Egypt along with Britain and France.
Russia
The relations between Great Britain and their former colonies would be deterred.
On one to one basis Turkey would win, unless atomic weapons were used then Israel would win.
which rulers would lead European countries.
Egypt, Great Britain, Israel, and France.
Britain.
There is currently no war in progress involving Israel and the inhabitants of Gaza.
There have been several, but Israel has been victorious in all of them. There is some question in Egypt as to whether Egypt or Israel won the War in 1973, but considering that the ceasefire was signed while Israeli soldiers were advancing, it would seem to be an Israeli victory. The debate on the Arab-Israeli War of 1973 is discussed more fully at the Related Question below: Who won the war between Egypt and Israel in 1973?