Imelda and I were out and about yesterday, having a look at and from the new Tate Modern building. The view from the top is worth the trip by itself. The building looks easily climbable and extremely tempting. At 64.5m tall it looks like a multi-pitch slab, but I don’t know if the blocks would support body weight. A number 3 or 4 Camalot could be of use if using ropes.
Up the right corner then the airy arete looks like the best line.
p.s. there’s a cafe at the viewing platform level near the top 