Unlicensed landfill AND gravel extraction?

Unlicensed Landfill and/or Former Gravel Extraction at Billet Road Site 99? Does anyone know?

In Mar 2016 Savills were asked to report on the site (now Site 99) at Billet Road and provide advice on Minerals there.

Savills  say:  Environment Agency told them that the site was an unlicensed tip and received waste between 1970 and 1973 and that the Environment Agency have NO additional information including whether the tipping was illegal or undertaken via a waste exemption.

Savills say: it is designated Mineral Search Area. Area where the presence of significant mineral reserves is indicated by the BGS mapping but not yet confirmed by bore hole drilling (boreholes shown in purple below are insufficient and do not cover the whole area).

Savills File: CHMI361971 Plan: WillowSite1 Drwn by: AEH Date: 22 Feb 2016

Savills say: the Minerals Local Plan notes that Brett Lafarge indicated that the site may have been worked and then landfilled by PT Reid Ltd between 1965 and 1975 adding that the data is not entirely reliable and the area could contain viable deposits. Additionally the Minerals Local Plan shows a large part of the land having been worked in the past.

Redbridge Former minerals extraction areas

So if the site was worked and landfilled then "Policy M9: Priorities for Restoration and After-Use" would apply:
The Council’s priority objective for restoration and aftercare of former minerals land is the promotion of nature conservation as an end in itself, or in tandem with agriculture or open space sport/recreation. Restoration strategies should support national, regional and local biodiversity priorities as expressed in:

• The UK Biodiversity Action Plan.

• The Royal Society for the Protection of Birds (RSPB) Minerals Restoration Potential (MRP) Project. Where sites are identified as capable of supporting priority habitat creation or prove to be capable of achieving RSPB objectives, the aim should be to restore those sites in line with MRP Project habitat priority levels.

• The Mayor of London’s Biodiversity Strategy and London Plan Policy 7.19 Biodiversity and Access to Nature.

• The Redbridge Biodiversity Action Plan.

Some former minerals quarry land in Redbridge has been restored to agricultural use. Although returns from farming urban edge land may be very marginal, the Council would support agriculture at least on those parts of sites with less critical environmental values. 

Much former minerals land in Redbridge has also been restored for wildlife and open space and recreational uses. These include footpaths, bridal ways, reed beds, riding schools, football pitches, sailing and angling clubs and golf courses. There have been some nature conservation initiatives on land previously used for minerals extraction and more are planned. Nature conservation and sport/recreation can go hand in hand as appropriate uses of open space.

As Site 99 Contains a stable, horses grazing, kennels, wildlife, a farm and agricultural use, which all fit the "restoration and aftercare of former mineral sites", exactly why does London Borough of Redbridge plan to build on it?