Nolan was sent off twice inside four weeks against Liverpool and Fulham over the festive period, and Allardyce admitted he questioned whether the former Bolton and Newcastle star would remain as captain of the Hammers, let alone get back in the side.
However, the 31-year-old has been in wonderful form since and has scored five goals in five games which has played a major role in West Ham now occupying a top half position.
Nolan’s form for the first half of the season was retched and the Hammers fans made their feelings clear on numerous occasions.
A lot has happened since then, though, and Nolan received a standing ovation when substituted in the second half during yesterday’s win over Southampton, and Allardyce is also appreciating the form of his skipper.
“I can believe the turnaround because I know his qualities,” he said of Nolan.
“What I like about it is that he has gone about his job and made sure he repays everybody at the club for what happened.
“It was the lowest point of his career, I think, because it was not just one sending off but two in a short period of time.
“The contribution now is massive and it is not just the goals, but the pass he made for the first goal – a top quality pass at this level, which split open a very resilient Southampton defence. Long may it continue.”