By Amanda Stringfellow @amanda_l_s
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But as the Royal Marines Corps celebrated its 350th anniversary last month, these former 'Bootnecks' were happy to strip off and put themselves on show in the name of charity.
Now in its fifth year, the Go Commando calendar raises money to help serving and former Royal Marines and their families.
This year's calendar has a brand new focus on the lives of Green Berets once they've left the armed forces and returned to civilian life - under the slogan "Once a Royal Marine, always a Royal Marine".
The calendar tells the story of eleven hunky heroes who have served our country and their lives post-military.
The brave Green Beret’s include Mr May, LCpl Ash Swinard, who was wounded by an IED in Afghanistan in July 2011 – resulting in a below the knee amputation.
Mr August is Sgt Rob Driscoll, who was discharged after being left partially deaf from a grenade attack while on tour - but bounced back to be a successful personal trainer.
Mr June WO1 Si Atkinson, a former specialist and world class award winning chef in RM Catering Corps poses with a frying pan, whilst Cpl Stu Beattie, a Falklands Veteran proudly displays his medals from his days in service.
Cpl Mark Time who served 11-years as a commando is Mr April, photographed with his successful novel ‘Going Commando’.
Mark started writing as a therapy to help with the mental health issues he has struggled with since leaving the Marines.
Mark, now an author and journalist, said: “Family is really important to me and it’s important in the Marines.
“The ethos behind the charity is the family bond, the brotherhood in the Corps and the wives, girlfriends mothers and children.
“You come out of the Royal Marines and you go into civvy street but a lot of the skills you have, normal jobs don’t really need and it can be quite a lonely place.
“The calendar itself goes right up from boys who have just come out of Afghanistan to those who are getting towards their mature years.
“The wide spread of the calendar encompasses the idea that even when you’ve left the Royal Marines you’re still involved – you are part of a brotherhood.”
The calendar was shot by former Royal Marine, Martin Hill, who hung up his boots to turn pro-photographer.
He shot the images at civilian locations relevant to the military charity and the former Marines featured.
Keeping it in-house the commando collaboration was designed and printed by Andy Screen, and Jason Chappell - who stars as Mr September in the calendar.
Go Commando was founded in 2010 by businessman Sean O’Brien and is run by chief executive, Debbie Howarth.
The 2013 Go Commando calendar alone raised a staggering £120,000 for the cause.
You can buy the Go Commando calendar at http://www.gocommando.org.uk/