The Strictly Come Dancing judging panelThe line-up for this year’s Strictly Come DancingChristmas special is starting to take shape.On Monday evening, it was revealed that athlete Harry Aikines-Aryeetey – better known to Gladiators fans as “Nitro” – will be the fourth celebrity being put through their paces this festive season.Interestingly, Harry was previously widely rumoured for the main series of Strictly earlier this year, but it turned out to be his Gladiators colleague Montell Douglas who had signed up instead.