Who do you think was waiting for us when we arrived at No 10 image yesterday Downing Street 012with our post office petition? None other than the BBC’s political editor Nick Robinson, I wonder who gave him the tip off about our visit.

He was very charming and said he remembered me being on the Andrew Marr Sunday AM programme along with himself and other political bloggers (not sure I believe this) and happily posed for this photo with Julian Sturdy and constituency supporters Joe and Bill. Nick handed my camera to a photographer from The Observer who took this pic.

The actual presentation of the petition was over in a blink. Julian knocked on the door, a policeman opened it and took Julian’s file. There was no cup of tea on offer, that was it.

Shaun Woodward, Tory defector and Northern Ireland Secretary, and Douglas Alexander, International Development Secretary, walked out of No 10 as this was happening and nearly ruined my photo of Julian handing over his petition.

We then headed to nearby Portcullis House where MPs have their offices, and were escorted in by Labour MP John Grogan to save us waiting outside for our next appointment with Charles Hendry, Shadow Minister for Energy, Industry and Postal affairs. John had been photographed outside No 10 with Julian by the York Press for their own post office protest petition which they presented after ours.

Portcullis House is a place where you have to act cool when you see ministers and top politicians walking along the corridors and eating in the cafe. But I do love the buzz of the place, I always find it thrilling, and you never know who you are going to bump into.

Who would have imagined that I would have been chatting to the Mongolian Ambassador Dalrain Davaasambuu (pic) who was meeting with John Grogan as chair of the all party parliamentary Mongolian group, explaining to him about post office closures.

The parliamentary group is hosting a business promotional event for Mongolia next Monday and one of John’s tasks is to ensure that Mongolian vodka, their national drink, will not prove to be fatal for MPs. He told me there had been 12 recent deaths in Mongolia from contaminated vodka, he could not risk that happening here! Will there be an official taster on hand, I wonder.

We then went into the House to listen to a debate on human trafficking, a subject close to my heart as you know, which would have been the perfect end to the perfect day, except for my nightmare journey home thanks to signal failures at King’s Cross when every train in and out of the station was cancelled.

Update 18 January: My story about Mongolia’s deadly vodka makes the Hugo Rifkind People column in today’s Times.