In article , Graham. scribeth thus
Here yer go. If you blow up that pix a bit you can see Sol Data writ on it. They are certainly 2.4 or 5.8 GHz panel aerials which can be used to link back from point to point. If you have a close look at the pix on the bottom right of this page don't arf look familiar;)..
And there doing work for cross-rail the shard and other urban projects...