Some regular readers will remember by "brush with the law" last year for taking pictures of transport police at my local station, so I have sympathy for Alan!
Staff from bus operator Nexus ordered him to leave because of increased security measures following last July's terrorist attacks on the London Underground and a bus. Alan said "I explained I was not doing any harm but he just said I would have to stop. I felt as if they were accusing me of being a terrorist, which is ludicrous.
"I was embarrassed and there are no signs to say you can't take pictures of buses coming in or out."
Poor old Alan, looks like it's time for him to find a new hobby!