Pictured before being kicked off their flight: British stag party who forced plane to land because of their drunken antics face £20,000 fines (and the groom also faces the fury of his fiancée)

• Joshua Mariner was groom-to-be whose stag party forced flight diversion
• The 26-year-old, due to wed fiancée Abi Whitmore, was flying to Bratislava
• But stag party reportedly became aggressive when refused more alcohol 
• Six men from Southampton arrested after London flight diverted to Berlin
• A passenger on board the flight told MailOnline the group were a 'disgrace' 
• Do you know any of the stag party or the bride? Get in touch with us by phoning 0203 615 1861 or email sam.tonkin@mailonline.co.uk

By Darren Boyle and Anthony Joseph and Sam Tonkin For Mailonline

Posing for the camera shortly before boarding the plane, this is the British stag party whose drunken antics and alleged punch-up at 30,000 feet caused a Ryanair flight to make an emergency landing.

Building company director Joshua Mariner, 26, was the groom-to-be whose 12-man group forced the diversion of a London to Bratislava flight after reportedly becoming unruly and aggressive.

Two members of the bachelor party are said to have exchanged slaps and punches after swearing and shouting at each other across the aisle of the Boeing 737.

Six of the men were hauled off the plane when it made an unscheduled stop in Berlin after some of the group allegedly grew irate at the decision by cabin crew to refuse to serve them more alcohol.

At Luton Airport: Posing for the camera shortly before boarding the plane, this is the British stag party whose drunken antics caused a Ryanair flight to make an emergency landing. Groom-to-be Joshua Mariner is circled

Happy couple: Mr Mariner, who is due to wed fiancée Abi Whitmore (pictured together with their one-year-old daughter), was the groom-to-be whose 12-man group forced the diversion of a London to Bratislava flight

The groom-to-be whose stag party forced a flight to be diverted because of alleged drunken behaviour has been named as Joshua Mariner. He is pictured right next to his fiancée Abi Whitmore and brother Sam (left)

German police initially said Mr Mariner, from Southampton, was one of those arrested but his 29-year-old brother Sam, who was not on the flight, claimed this was not the case. 

‘A couple of them let him down but he can’t control their behaviour,’ he said.

‘He’s not particularly happy about it I don’t think. It should not have happened on a plane, and on a flight with families on,’ he added. 

Mr Mariner, who is due to wed fiancée Abi Whitmore in March, is understood to have been allowed to continue his journey to the Slovakian capital with some of the group.

The six stag party members arrested now face fines of up to £20,000 each. 

A passenger on the flight told MailOnline that the group were so drunk they 'struggled to walk' before boarding at Luton Airport.

It is also claimed that one of the men stripped naked in front of the 170 passengers.

Mr Mariner, who describes himself as a partition and ceiling specialist and director of his own building company on his LinkedIn page, has a one-year-old daughter with Miss Whitmore, 29.

The detainees, aged between 25 and 28, could now face a fine of nearly £20,000 each under the Aviation Security Act. 

Alexander Koller, 46, from Margate, Kent, was on the flight and branded the group a 'disgrace' but also criticised the airline and German authorities over their handling of the situation.

The Austrian tour lecturer told MailOnline: 'The passengers were a disgrace - by the way, (they were) not the only drunken, obnoxious people on this flight by any means. 

Groom-to-be: Mr Mariner (right), who is due to wed fiancée Abi Whitmore (left) , was onboard the Ryanair 737-800 when several members of his 12-man bachelor party reportedly became unruly and aggressive

Mr Mariner (right) describes himself as a partition and ceiling specialist and director of his own building company on his LinkedIn page. He is pictured with his brothers Tom and Sam in a family photo

The Boeing  737-800 was due to fly to Bratislava in Slovakia but was forced to divert to Berlin 

'The fact that they were allowed to board at all after making a huge nuisance of themselves in the departure hall at Luton and being so drunk that some were struggling to stand, was an even bigger disgrace. 

'It was a total failure by Ryanair's ground staff at the gate and by the cabin crew who should have spotted them. This was not hard given that they were extremely loud and obnoxious whilst boarding and finding their seats.'

A spokesman for Ryanair said the airline has 'strict guidelines' to deal with disruptive and drunk customers.

Mr Koller believes the whole incident could have been avoided. 

Describing the moments after landing at the German capital, he added: 'The operation in Berlin was pathetic, with German airport police not speaking a word of English and needing a translator, proceeding without any plan and the six of them waiting for about 10 minutes in the aisle near the door to be taken away. 

A Ryanair aircraft flying between London to Bratislava was forced to divert due to an unruly stag party 

The flight took off from London Luton airport and was forced to divert as it passed over central Germany

The captain radioed air traffic control at Berlin's Schoenefeld Airport (pictured) and the nine-year-old aircraft was greeted at the terminal by German federal police

'This was potentially a very dangerous situation. The only saving grace was that these people were not only drunk and vulgar, but also so stupid that they thought they could simply carry on partying in Berlin for which reason they did not seem to mind being taken off the plane.

'There is often no accounting for the baseness of human behaviour. In this case, however, it was extremely easy to spot. The situation was entirely preventable.' 

The aircraft took off from Luton at 6pm on Friday and was about an hour into the flight and cruising at 37,000 feet, over the spa town of Bad Frankenhausen, Thuringia, when the incident happened.

DO YOU KNOW ANY MEMBERS OF THE STAG PARTY OR THE BRIDE? 

Get in touch with us on 0203 615 1861 or email sam.tonkin@mailonline.co.uk

The flight landed within 30 minutes in Berlin's Schoenefeld Airport. The captain radioed air traffic control and the nine-year-old aircraft was greeted at the terminal by German federal police, according to Spiegel Online. 

In total, there were 170 passengers and crew on board the aircraft. 

According to German officials, they each now face a £19,700 fine as well as civil legal claims from Ryanair.

German police confirmed that six of the 12 passengers on the stag weekend, including the groom, would not obey the instructions of the cabin crew. 

In a statement, German Federal Police confirmed: 'During the flight, six of the 12-member group interfered with safety on board.'

The aircraft took off after the six men were removed following an hour-long delay. The other six men reportedly continued their journey to Slovakia.

The detainees were later released after police took their details. They will be due to return to Germany at a later date to appear in court. 

A spokesman for Ryanair told MailOnline: 'This flight from London Luton to Bratislava diverted to Berlin after a number of passengers became disruptive in-flight. 

'The aircraft landed normally and police removed and detained these individuals at Berlin Schonefeld Airport. 

'We will not tolerate unruly or disruptive behaviour at any time and the safety and comfort of our customers, crew and aircraft is our number one priority. This is now a matter for local police.'