Basically the idea is to create themed collections which then act as 'personal journeys' through the museum "reflecting different moods and enthusiasms and revealing the extraordinary breadth of work on show."
Yes it sounds arty and pretentious, but fair play to Tate Britain for making the whole thing incredibly accessible and friendly. For example, the painting above (Ford Madox Brown's Carrying Corn) is included in the 'Rainy Day Collection' because "What is the last thing you want on a rainy day? Probably a rainy day."
There's also the 'Odd Faces' collection, the 'I Like Yellow' collection and, our personal favourite, the 'I've Just Split Up' collection ("Now you need to get rid of any melancholic trace. Get as sad you can with The Lady of Shalott by John William Waterhouse. After this why not go downstairs for a coffee to pull yourself together?").
If you're not feeling the Tate's choice of paintings then you can always create your own collection and enter it into their competition. If it wins it will be made into a leaflet and will be available to visitors at the museum.
Hmm, we wonder how many London paintings they have in there?