Big Ben struck midday as he walked through Parliament Square. The spring sun was warm, almost hot, but he kept his brand-new puffa jacket zipped up to the neck. A police car siren sounded, and he turned to watch the driver skilfully manoeuvre his vehicle through the snarl of traffic and on towards Westminster Bridge.

He was feeling slightly apprehensive, but at the same time elated. At last he was about to do something meaningful, something significant. Waiting at the pedestrian crossing, he smiled and gently squeezed the few twists of green garden twine nestling in the palm of his right hand. For comfort.

As the traffic lights turned to red and the green man flashed on, he crossed with the rest of the crowd waiting at the kerbside. Japanese tourists walked with their camcorders at arm’s length, watching their screens while filming the imposing, magnificent buildings. Motorbike couriers revved their engines, impatient for the lights to change.

He joined the queue outside St Stephen’s Entrance, the public access point to the Houses of Parliament. Armed police watched impassively as the line of visitors slowly shuffled towards the wide entrance doors leading to the X-ray machine and the metal detector blocking the corridor about fifteen metres inside the building.

Ahead of him was a small group of young women, some with babies in carriers strapped to their fronts, brandishing leaflets warning of the health hazards created by a newly opened landfill site and chatting animatedly about the imminent meeting with their local MP.

The queue was in a suntrap, and tiny beads of sweat dotted his upper lip, but still he kept his chunky Gap jacket zipped up. He looked smart: his hair was neatly combed, his trousers were immaculately pressed and his black shoes still shone with newness.

A thin trickle of sweat ran down the side of his head as he turned and smiled politely at a group of pensioners who were beginning to line up behind him. The women wore their best dresses and light coats and the men were in blazers, their old regimental insignias sewn onto the breast pocket and their highly polished medals hanging proudly above.