The brothers of Corrie McKeague have posted heart-rending Mother’s Day messages online six months into the search for the missing RAF man.

Darroch and his brother Makeyan have taken to Facebook to tell Nicola Urquhart how much she means to them on a day that has undoubtedly been a difficult one for the worried mum.

Darroch, 21, said: “Happy mothers day to the best mum in the world I don’t know what the hell i would do without you!

“Thank you for everything you have done for me and especially for the past 6 months I honestly don’t see how I could get through all this without having you!

“I know mothers day isn’t complete without corrie but just know all 3 of us love you so bloody much and you truly are the best mum anyone could ask for all the love in the world darroch xxxxxxx [sic].”

READ MORE: ‘I’m just existing’: Father of Corrie McKeague makes heartbreaking confession 

His brother Makeyan added: “I honestly can not put into words how much this woman means to me. She is the strongest person I know and I am so very proud to have her as my mum!

“The past 6 months have been difficult to get through and I have no idea how I could have gotten through it without you!

“You have guided me to be the man I am today and continue to help me grow to be a better person. I can only hope that whenever I have kids of my own I can be half the amazing parent you are!

“Now before I waffle on to long I just want to say I love you maw! And happy mothersday!

“Thank you for being there for me where no one else can! Xxxxxx [sic].”

Corrie, 23, a Royal Air Force Regiment gunner from Fife, went missing in the early hours of 24 September 2016 in the Bury St Edmunds area of Suffolk in England.

A bin lorry was seen on CCTV near Brentgovel Street in the town at around the time he was last seen.

The vehicle then appeared to take a route which coincided with the movements of Corrie’s phone, sparking fears he somehow ended up in a bin that was then picked up by that lorry.

READ MORE: Family praises police search team’s efforts at Milton landfill site

An area of a landfill site in Milton, Cambridgeshire, where the load was deposited has been under intense scrutiny for almost three weeks now, in a search that could last up to ten weeks.

On Friday, it was confirmed the search team trawling the site has been through more than 845 tonnes of waste.

Nicola has previously said she was “terrified” of what the search team might find.

She added it would be “quite unrealistic for me to presume Corrie could still be alive,” but said “thinking that and believing it are two completely different things.”

A bin lorry linked to the disappearance was initially thought to have collected an 11kg (1st 10lb) load, but police said it was later found to be more than 100kg (15st 10lb).

Nicola has said this could “only mean one thing.”