But their approach is likely to be rejected by United.
Gainsborough boss, and former Iron defender, Steve Housham told the Lincolnshire Echo: "I have approached Scunthorpe and asked the question about Luke Waterfall,
"I would love to bring him back here on loan because he would be a massive help to this team at this moment.
"I know he was on the bench for Scunthorpe at the weekend, but I also know he is very highly thought of at Scunthorpe and, up to now, we haven't had any luck bringing him back on loan. But we will keep trying and I will keep asking the question".