Estate Surveys - Including drains?

The Beech Gardens project pulled up all of the gardens and tiles on the western part of the highwalk towards the Barbican tube station, the area was covered with a waterproofing membrane and the tiles and gardens reinstated largely as before, though the planting was changed (to mixed reviews).

One thing that didn't happen as part of the Beech Gardens project was fixing the drains, a thing you would have thought would have been right at the top of the list given that the whole project was kicked off in response to water leaking through the podium into the Virgin Active gym below.

So now we have new gardens, but the highwalk still floods and Virgin Active still suffer leaks.

The City are reminded of the Beech Gardens project when they raise the prospect of doing the same strip-back + membrane + new tiles and gardens thing at the eastern, Ben Jonson House end of the highwalk.

In particular they are reminded to make sure they fix the drains first, before getting into any other highwalk works.

Which makes the following from the BEO interesting.  Perhaps there is hope:

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Reminder Notice: Surveys across the Estate
Podium Works

Please be aware that there will be a topographical survey and a pre-drainage survey taking place for the podium works across the Barbican Estate.

Topographical and utility surveys between 28 to 31 August and the drainage “Pre-survey” from 23 August for a month.

Both surveys are non-intrusive, we thank you for your cooperation and understanding in this regard.