Leeds United’s search for defensive signings has now entered the final week of the January window with the Whites yet to replace the exits of Djed Spence and Luke Ayling – but Newcastle could help. Spence returned to Tottenham earlier in the month, with Leeds cancelling his loan. It has since emerged that Spence’s attitude was poor – often turning up late to meetings, and failing to show for a team event. Ayling, meanwhile, has ended his eight-year stint at Elland Road by joining Middlesbrough on loan until the end of the season – with his Leeds contract due to expire in June. He will leave Le…