Free Traffic Legal Advice

One PCN refers to Tottenham Ct Rd "by junction with Stephen Street", the other  "by junction with Chenies St". These are two separate locations on Tottenham Court Road and are 290 metres apart.

So here is the junction with Stephen Street: -
https://maps.app.goo.gl/jeT5jChsRQbcHUTe8
Note that the LH sign is obscured by the building scaffolding in this July 2024 view
And here is the junction with Chenies St
https://maps.app.goo.gl/Z4EpBzQy6ErgkGc46
There seems to be only a single sign here.

So it would seem you were driving south on Tottenham Ct Rd and passed two separate bus gate signs. You were 14 minutes into the restricted times of 08.00 to 19.00 Mon-Sat.

I'm not sure how you can submit reps, as they are for two separate locations, albeit quite close. The photos on each PCN show clearly the difference in locations. You could of course claim that it is just a single contravention as the time on the PCN shows.

Thank you for your response. I wonder wouldn't it be considered as a single journey on the same road? Both PCNs issued for the same contravention.

As in regards to the restriction sign being after the junction wouldn't that imply that the sign is not installed well in advance?

Well, you could submit reps on those lines, pointing out the PCNs have the same time on them. They may agree to cancel one of them.
The signs are placed after the junction because that is needed so that vehicle can turn off or onto Tottenham Ct Rd before the restriction starts.