Important: Shard HGV Routes published for Fri 16th > Sat 17th April 2010. Avoid area!

http://www.thisislondon.co.uk/standard/article-23825741-our-grief-and-pride-by-family-of-student-killed-by-tipper-truck.do

The lorry was delivering to The Shard. Had the vehicle been involved in an accident on site HSE would crawl all over the place. Since it happened on the road they're not interested.
The Police collision investigation team and Commercial Vehicle Unit were crawling all over the lorry after the crash. They are authorised HSE inspectors and they will have already visited the lorry firm to investigate how they operate. If they find problems they can insist on improvements being made.
The real problem is that it is very hard to get a prosecution. So far I don't think any company has been prosecuted under HSE law for being involved in a road death.