Main Chance, The (An Edgar Wallace Mystery)

After handing over a door key to Christine in a café, Miller (Bernard Stone) asks Michael Blake where he's from as they drive to the races. Richard Lovejoy (RL) identifies the scene as Queens Road, Hersham in Walton-on-Thames, Surrey with Sir Richard's Bridge taking Ashley Road across the South Western Main Line in the centre background.

Peter Bywaters found more trees which have been allowed to mature.

Miller continues to quiz Blake about his background. RL explains that the brick wall stands on the eastern side of Sir Richard's Bridge while the roof of number 101 Ashley Road can be seen to the left.

Behind the trees, Peter Bywaters explains that a row of new houses built along the railway embankment have obscured number 101 Ashley Road.

Blake tells Miller that there's only one thing he needs to know about him . . . "I don't like questions'. Mayfield Road in Walton-on-Thames located by RL, with Walton-on-Thames railway station in the background.

Peter Bywaters found that building upgrades to the station have already been made with more to come, it appears.

Watched by Christine, Michael Blake (Edward de Souza) leaves a bookmakers. The east side of Queensway in Bayswater W2 . . . .

. . . . facing number 74. (PW)

The gambler steps off the pavement to get into his car. Looking south on Queensway.

Parked vehicles obstruct the view. (PW)

Blake is surprised to see Christine (Tracy Reed) sitting on the back seat of his Triumph Vitesse. Queensway in Bayswater W2 with Bayswater station in the background.

The building seen under construction in 1964 still stands to the right. (PW)

With the radio playing, Blake drives to meet with Christine's employer. Looking east along the A244 Esher Road at Hersham, Surrey located by Richard Marum.

In Richard's comparison, Riverside Road can be seen to the left on the opposite side of the road.

As the Triumph speeds past the camera pans to follow. Esher Road in Hersham, looking west identified by Richard Marum.

Richard points out the junction for Hersham and Walton-on-Thames at the roundabout adjacent to the Texaco petrol station in the distance.

The disgraced ex-RAF pilot turns from the main road and follows a driveway to the house where Potter and his secretary Christine are waiting.

Outside the front door of the mansion, Charles the Chauffeur (Anthony Bailey) looks up from polishing the bumper of a Mercedes as Blake brings his car to a stand.

Declining Potter's offer of a job, Blake leaves a club after bookmaker Harry Carter demands that a gambling debt is paid. Not a stones throw from the Bayswater Road, in fact looking towards Bayswater Road and Kensington Gardens, Dave W finds Blake leaving 74 Queensborough Terrace, London W2 (RL)

Watched by Christine, Blake gets into his car and drives home to find that his flat has been ransacked and his money stolen. Having found the previous capture location and Blake having to have fortunately been able to park outside Dave sees the view now to be that of the other side of Queensborough Terrace, the Bayswater Road and Kensington Gardens. (RL)

Having returned to accept Potter's offer of work collecting a package by aircraft for £1500, Blake leaves the sophisticated smuggler's house.

Coming out of a property on the estate, Christine waves as Blake approaches.

Giving Christine a lift to town, Blake asks questions about her employment before she declines his offer of dinner. Richard Marum recognised this as the former A3 Hook Roundabout slip road which was replaced with Hook Rise North when the Esher Bypass opened in 1976.

The now closed A3 Hook exit taken by Richard.

Blake returns from another meeting with Potter during which the route he will fly is explained. Richard Lovejoy (RL) identifies this as the underpass at Hook in Surrey, at the junction where the A3 Kingston Bypass meets the A243 Hook Road.

Richard Marum explains that this is the A3 eastern approach to the underpass with the closed slip road on the right and the Esher bypass bearing off to the left.

Facing eastward along the Kingston Bypass at Hook identified by RL.

The A3 western approach to the underpass captured by Richard Marum.

Following an initial flight, Potter and Christine arrive at a private flying club where Blake has just landed. Valerie Ryan explains that her brother John Stuart Hoare was the pilot for the flying scenes in this production which were shot at Biggin Hill in Kent. Sadly, John passed away in October 2023.

The next day, on the pretence of taking Potter on a business trip to France, Blake prepares the Piper PA-30-160 Twin Comanche. Biggin Hill confirmed by Valerie Ryan.

Potter (Grégoire Aslan) says goodbye to Christine. Biggin Hill airfield near Bromley, Kent found by Paul Brennan.

Charles helps Potter into the aircraft. Recognised by Paul Brennan, this is Biggin Hill airfield.

Crossing the Channel, Blake lands in northern France.

A car approaches as Blake taxis from the runway. Biggin Hill airfield at Biggin Hill in Kent confirmed by Valerie Ryan who's brother John Stuart Hoare performed the flying in Twin Comanche G-ASLE.

Potter gets out of the Piper and walks towards his French connection before Blake takes off again. Valerie Ryan confirms that the flying scenes were shot at Biggin Hill airfield.

At a remote airstrip two Frenchmen (Alexander Juran and Makki Marseilles) light cigarettes as Blake comes in to land.

The two Men drive up to the Piper after it touches down and a case full of diamonds is swiftly handed to Blake.

Back in England, Charles answers a radio telephone call as he spots Blake coming in to land.

With the case received by Charles. Ross (Jack Smethurst) knocks the chauffeur out and takes it before being driven away by his boss Joe Hayes (Stanley Meadows).

After Charles takes Hayes to Potter and they realise that they have both been double crossed, Christine is seen smiling as she drives away. Looking across Reigate Avenue recreation ground from Reigate Avenue in Sutton, Surrey with Glenthorne High School in the left distance located by Richard Marum.

Richard provides this matching view.

The camera follows the Austin Cambridge as Blake flies back to the Continent. Richard Marum identifies this as passing beneath the Blackfriars to Sutton railway bridge on Reigate Avenue in Sutton with the 1930s St. Helier estate in the right background.

The trees, graffiti and speed camera are the most notable changes in Richard's comparison.