Scotland on Sunday has obtained remarkable details of one of the most memorably bizarre episodes of the Bush presidency: the day he crashed into a Scottish police constable while cycling in the grounds of Gleneagles Hotel.

The incident, which will do little to improve Bush's accident-prone reputation, began when he took to two wheels for a spot of early-evening exercise during last year's G8 summit at the Perthshire resort.

After a hard day's discussion with fellow world leaders, the president was looking for some relaxation. Instead, he ended up the subject of a police report in which the leader of the free world was described, in classic police language, as a "moving/falling object".

It was "about 1800 hours on Wednesday, 6 July, 2005" that a detachment of Strathclyde police constables, in "Level 2 public order dress [anti-riot gear]," formed a protective line at the gate at the hotel's rear entrance, in case demonstrators penetrated the biggest-ever security operation on Scottish soil.

The official police incident report states: "[The unit] was requested to cover the road junction on the Auchterarder to Braco Road as the President of the USA, George Bush, was cycling through." The report goes on: "[At] about 1800 hours the President approached the junction at speed on the bicycle. The road was damp at the time. As the President passed the junction at speed he raised his left arm from the handlebars to wave to the police officers present while shouting 'thanks, you guys, for coming'.

"As he did this he lost control of the cycle, falling to the ground, causing both himself and his bicycle to strike [the officer] on the lower legs. [The officer] fell to the ground, striking his head. The President continued along the ground for approximately five metres, causing himself a number of abrasions. The officers... then assisted both injured parties."

The injured officer, who was not named, was whisked to Perth Royal Infirmary. The report adds: "While en-route President Bush phoned [the officer], enquiring after his wellbeing and apologising for the accident."

At hospital, a doctor examined the constable and diagnosed damage to his ankle ligaments and issued him with crutches. The cause was officially recorded as: "Hit by moving/falling object."

No details of damage to the President are recorded from his close encounter with the policeman and the road, although later reports said he had been "bandaged" by a White House physician after suffering scrapes on his hands and arms.

At the time Bush laughed off the incident, saying he should start "acting his age".

Details of precisely how the crash unfolded have until now been kept under wraps for fear of embarrassing both Bush and the injured constable. But the new disclosures are certain to raise eyebrows on Washington's Capitol Hill.

Jim McDermott, a Democrat Congressman, last night quipped: "Not only does he break the law over here on eavesdropping and spying on our own citizens, but it seems he can't even keep to your law when it comes to riding a bike. It's another example of how he can't keep his mind on the things he should be thinking about."

Bush often takes to two wheels for exercise, after pain in his knees forced him to give up running. He regularly rides at secret service training facilities near Washington, and the G8 accident is just one in a long list of mishaps. In May 2004, he fell off his mountain bike, grazing his chin, upper lip, nose, both knees, and his right hand, while riding on his ranch in Texas. In June 2003, he fell off his hi-tech Segway scooter.

In Scotland, an accident such as the one at Gleneagles could have led to police action. Earlier this year, Strathclyde Police issued three fixed penalty notices to errant cyclists as part of a crack-down on rogue riders. Legal experts also suggested lesser mortals could have ended up with a fixed penalty fine, prosecution, or at least a good ticking-off from officers.

John Scott, a human rights lawyer, said: "There's certainly enough in this account for a charge of careless driving. Anyone else would have been warned for dangerous driving.

"I have had clients who have been charged with assaulting a police officer for less than this. The issue of how long the police officer was out of action for is also important. He was away from work for 14 weeks, and that would normally be very significant in a case like this."

No-one was available for comment from the White House