One of the main challenges Costain, the contractors working on the project, has faced during construction is enabling the country’s fourth busiest station to continue day to day operations.
And as any commuter can tell you, it has not been without issue its problems.
The Bedford bound Thameslink train has not been able to stop at London Bridge, with Govia Thameslink Railway (GTR) only able to run shuttles to and from Brighton – and then only during off peak.
And because of the disrupted services being sent off to already busy stations such as London Victoria, any issue on the line creates more disruption – up to four times more, it is estimated.
This will change, Mr Hutton promises, as he leads us through the bowels of the station, up ladders and along walkways, before we reach one of the new platforms.
Longer than the neighbouring Shard is high, these are set up for Thameslink’s new 12 carriage Class 700 trains.
At present most of the trains that run the route are made of just eight carriages. The extra space will help the operator put on an extra 1,000 seats during the morning rush.
Back down below the station, minding the many miles of wires and cables as we go, we come up at the pièce de résistance, the concourse.
Despite the cranes, trucks and other assorted machinery littered around, you get a sense of its immense scale.
The concourse is on ground level with all platforms above.
There are 24 new escalators disappearing up into the heavens, space for 70 shops, bars and restaurants and sets of stairs going off into all four corners.
When finished it will increase the capacity of the station by 65 per cent and make London Victoria’s concourse feel like Hove’s.
And it’s not just big, it’s clever as well. The train platforms are built on multiple levels ensuring less of a backlog when there is a problem on the approach.
And look up from the concourse and you see all the undersides of the platforms have cedar wood cladding.
Not only does this break the monotony of the grey concrete, but also dampens the sound from the trains from above.
The great stations of the world are no longer just an arrival or departure point.  They are somewhere to go to shop, to have lunch or to spend an evening.
Case in point is London’s St Pancras, which reopened in 2007 after an £800 million rebuild.
Shoppers head to the station regardless of whether they need to catch a train, just to wander around its designer shops and trendy cafes.
Mr Hutton singled out the station as a comparison, promising a variety of businesses by the time it is finished in 2018.