If you look back along the road to the previous bus lane, it has a sign for a bus lane with a bicycle symbol below the bus symbol: -
https://goo.gl/maps/Z43T2nrqMs9izaKL9But then all you have are Cycle Lane signs
https://goo.gl/maps/gr2X3z7izbKzdoFE7and
https://goo.gl/maps/tLmzC5Qa29NnRzcF8For me, this is extremely poor practice, because bicycles are allowed in the bus lane, so it is very confusing, especially as one can still see the road markings for the cycle lane that was there before the bus lane.See GSV of July 2019 here: -
https://goo.gl/maps/qv6mshWuJAYX2uQ67It looks like the Highways Department have completely cocked-up the installation of this bus lane.
Correct signage would have the cycle lane signs replaced with bus lane signs with a symbol of a bicycle below the bus symbol.
The other aspect is that it was recently discovered that none of the London bus lane cameras complied with the law, not being approved by the Secretary of State, and a lot of appeals were won at London Tribunals. However, as you can imagine with the potential loss of lots of lovely dosh, there has been a mad dash by London councils to get them approved. However, whether this one that they used to whallop you with is so certified, I'm not sure. Somebody on here may know. If it isn't it is a slam-dunk win at London Tribunals.
However, are you prepared to take them to London Tribunals ? It is a double-or-quits gamble because you lose the discount option.