West Ham United defender Ben Johnson has emerged as a target for Leeds United this month with the full-back’s contract due to expire in June – and now both Leeds and Millwall have opened talks. Johnson, 23, could be available this month after managing just 10 outings in all competitions. Only three in the Premier League, though he has started and come on as a sub in West Ham’s last two matches. Our interest surfaced earlier in the window, as another name linked with filling the void at full-back. It comes after links with the likes of Connor Roberts, Neco Williams, Ben Davies and plenty other …