Make Photos of following locations:
The National Gallery, City of Westminster.
At the Millennium Wheel (London Eye), Lambeth.
At World of Tomorrow, Islington & Hackney
Brixton Recreation Centre, Lambeth
At Crosier & Cherry, Camden
At the Duck Island Cottage, City of Westminster.
At the Wellington Arch, City of Westminster.
At the Guy's Hospital, Southwark.
Then, you have to make one final photo.
At the Walkie Talkie, City of London.
Take the elevator up and make a photo from the balcony.
After that, you finally get a marker on the map and you know where to go.