No it doesn't say that - try reading wiki again:
On May 20, 1998, the House of Commons voted to ratify the 6th Protocol of the European Convention on Human Rights prohibiting capital punishment except "in time of war or imminent threat of war." The last remaining provisions for the death penalty under military jurisdiction (including in wartime) were removed when section 21(5) of the Human Rights Act 1998 came into force on 9 November 1998. The UK later (10 October 2003; effective from 1 February 2004[6]) acceded to the 13th Protocol, which prohibits the death penalty under all circumstances,[7] so that the UK may no longer legislate to restore the death penalty while it is subject to the Convention.