With all matches postponed due to the coronavirus outbreak, the situation surrounding players tied to temporary contracts is confused with games not expected to restart until next month at the earliest.
Although both the Premier League and the English Football League have both pledged to try and complete the season rather than follow the example of some semi-professional and amateur competitions by abandoning it altogether, many leading figures within the sport suspect the fixtures will prove impossible to complete until the end of June or early July.
That could see players such as Henderson, now in his second year with United, forced to return to their parent clubs before the calendar is fulfilled because their deals expire in 66 days time.
But to try and plot a course through the chaos, it is thought a gentleman’s agreement will be reached whereby those are automatically extended to cover any period of extension, providing the players concerned remain under contract with their permanent employers.
Officials at Bramall Lane, who opened talks about retaining Henderson’s services next term over Christmas, are set to adopt a similarly understanding approach towards the deals they struck with the likes of Callum Robinson and Rhys Norrington-Davies, who are on loan with West Bromwich Albion and Rochdale respectively.