The club has issued this statement: 'United Manager Martin Ling is currently being treated for a debilitating illness. He is receiving specialist care and, while we are able to report that his is making some progress, it is anticipated that Martin will be away from work for several weeks.
'Club and the League Manager's Association are fully supportive and are looking forward to his return.
'In the meantime, United officials have held talks with assistant manager Shaun Taylor and we have agreed to actively seek an experienced coach to help Shaun with the running of the team. This process has already begun in earnest.'
More top news
A shipment of humanitarian aid is on its way to help Syrian refugees, thanks to donations from across the Westcountry.
Rain to start the working week. Winds easing and turning warmer
Rain early on Monday. Brightening up and feeling warmer in the lighter winds