The work - to the tunnel lining on the Jubilee line between Finchley Road and Waterloo - includes six-day closures of stations during Christmas 2013 and Christmas 2014. There will also be a closure of the section over Easter 2014.
The work covers a number of weekends and bank holiday periods from June this year to the end of 2014, with the possibility of some additional closures in 2015 in order to complete the maintenance.
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The Hammers moved to the Olympic Stadium in May leaving their old site to be developed for housing.
The first officer shouted "look!" as the drone passed next to the right wing at around 11,000ft above south-east London.
They found a sheepish looking ewe with a traffic cone on her head in the middle of a field.