Enigma

An establishing shot of the view from Trafalgar Square towards Westminster

Today, with long-term scaffolding.

Claire (Saffron Burrows) walks through Trafalgar Square.

Following Claire, the camera pans right to one of Landseer's lions, with the National Gallery and St Martin in the Fields behind.

Now, with tourists.

A train carrying Tom Jericho heads for Bletchley. The Great Central Railway in Leicestershire.

Workers arrive at Bletchley Park.

Chicheley Road, Chicheley, near Milton Keynes in Buckinghamshire.

The entrance to Bletchley Park. Or rather, Chicheley Hall near Milton Keynes.

The entrance drive viewed from Chicheley Road; this is just to the left of the previous shot.

Jericho (Dougray Scott) and his military escort walk up to the front of the house.

Today the Grade I listed mansion serves as a hotel and conference centre.

Jericho returns to the bandstand in the grounds where he first met Claire.

The view from the southeast.

After a day in Bletchley Park, he arrives at his lodgings; Manor Street, Berkhamsted.

Now, with the restored and reopened Rex Cinema visible at the end of the road.

Pan from capture 9.

Little change here.

That evening, looking for Claire, he cycles to the cottage where she had been living.

In flashback, Jericho and Claire return to Tom's lodgings as dawn breaks after a long night out.

Manor Street, Berkhamsted, looking towards the High Street.

Still in flashback, the two are at a bridge. Neil Webster identified Kate's Bridge at the Royal Gunpowder Mills, Waltham Abbey, Essex

Kate's Bridge again (NW).

Another arch. Thanks to Neil, we now know that this is over the Boardwalk at the Royal Gunpowder Mills.

Jericho cycles to church.

Those trees are a dead giveaway. This is the road leading from Sacombe Green Road to St Catherine's Church, Sacombe, Herts.

After the service, he talks to Hester Wallace (Kate Winslet). They discuss what Claire was working on before she went missing. IMDB identifies St. Catherine's, Sacombe, Hertfordshire.

Rather fewer gravestones in shot now.

Miss Wallace has realised something important. She hurries to Jericho's lodgings.

Manor Street, Berkhamsted, looking onto Chapel Street.

The two set off in haste to Beaumanor. Coombe Road, Therfield near Ashwell in Hertfordshire identified by Jamie Crocker.

Jamie recognised the road, having cycled down it many times, then remembered that his son Ben had shot some drone footage at almost the same angle . . . and here's a capture from it.

A location with an aerial farm. Alan Twinam identified the former RAF Edlesborough on Tring Road, Edlesborough, Buckinghamshire.

As they head back to Bletchley, a police car is waiting for them.

The police try to stop them, but can't get past on the narrow road.

They approach a junction. Steve Hoole recognised Biggins Farm, Ware, Hertforshire.

Steve sent this now shot for confirmation.

Jericho squeezes the car past an oncoming lorry at the junction and loses the pursuing police.

Steve Hoole took this shot looking along the track that leads past Biggins Farm.

In due course, the police track the two down. They are taken to the bridge seen earlier in flashback (capture 13), where police are searching the area. Kate's Bridge at the Royal Gunpowder Mills, Waltham Abbey (NW).

Under the same arch seen in capture 15, accompanied by Inspector Leveret (Donald Sumpter) and Mr Wigram (Jeremy Northam). The Boardwalk, Royal Gunpowder Mills (NW).

Past what appears to be a derelict building. Neil W identified Press House No. 2 at the Royal Gunpowder Mills.

Jericho has realised that Puck (Nikolaj Coster Waldau) is involved in Claire's disappearance. He follows him from Bletchley Park to the railway station.

Loughborough station on the Great Central Railway.

Looking over the bridge parapet, he tries to spot Puck.

Not Loughborough, but Quorn and Woodhouse station on the Great Central Railway.

He Sees Puck board a train. Running along the platform, he manages to get onto the same train as it pulls away.

Quorn and Woodhouse station again.

Puck has jumped from the train. Police search the fields alongside the track. The Great Central Railway south of Quorn and just west of Swithland reservoir.

Richard Winchester visited the spot and took this shot.

Wigram waits as the police search.

Richard was understandably reluctant to trespass on the tracks, but took this shot of the location, complete with train, from the bridge.

Reluctantly, he accepts that Puck has slipped the net, and the police leave. The road bridge over the Great Central Railway at the location in capture 31.

The bridge today, with added graffiti, photographed by Richard Winchester.

The film presents this as the Adelphi Hotel in Manchester.

In fact, it's the Adelphi Hotel in John Adam Street, London WC2.

Jericho arrives in a taxi.

The sandbags have gone, but instead we have lighting gear, generators and a Warner Brothers truck; filming for 'Wonder Woman 1984' is imminent in Adam Street and Robert Street.

Jericho (apparently not short of petrol coupons) has driven to Scotland in pursuit of Puck. IMDB identifies Tigh Beg Croft in Argyll and Bute.

As Jericho runs towards him, Puck pulls away from the landing stage. Loch Feochan, Argyll and Bute.

Back in Trafalgar Square.

Even more tourists.

Jericho waits on the steps of St Martin in the Fields.

A brief moment when there were no tourists sitting on the steps.