Some History, courtesy of wikipedia:

"Mark Lane is a disused station on the Circle and District Lines of the London Underground, west of the modern Tower Hill station.
It was originally opened in October 1884 to replace the short lived Tower of London station, which was closed when the Metropolitan Railway and Metropolitan District Railway were connected to form the Circle Line and a new larger station had to be built. In 1946 the station was renamed from Mark Lane to Tower Hill."

Stupidly early on a weekday, I met up with Kev and we quickly darted to the access point. A quick shufty through the grill, and we were in the building's basement. We got kitted up in hi-vis and helments, and clamboured over the gate of a chicken mesh fence, onto the abandoned platform.

I was mainly interested in the old posters left behind from another era, so while Kev got busy downstairs, I got busy upstairs. This could have been just a walk through area, or a ticket office or a backroom office. However between the regular brick wall and the A/C fans, a passage leads off to the underpass (via an alarmed door). The underpass was the original entrance to the station.

At the top of some makeshift stairs were the posters left behind, gorgeous!

Back down the stairs and this was maybe the ticket hall, there are few signs as to what it would have been

As Kev left to go to work, I cracked on with capturing the platforms. This was the left platform facing the tracks, trains came close to this side as they approached Tower Hill Station.

A track light sits by the platform edge

Heading through the station remants, looking up one could see old details of the station's architecture.

The right hand platform had Tower Hill Station just past the end of it. A bit of Urbex cliche posing. This took about 3 attempts due to traffic.

Also on the right hand platform sits this rather wonderful John Jameson Whiskey poster, barely harmed over the years

And tucked to the side of the station in the centre was some kind of fuse board, with it's modern equivalent next to it.

And with that at 9.30am it was time to leave, sadly a bit late, as a door to the building above was open. Luckily I wasn't spotted, leaving it for others to enjoy.