Do you have a full address? Going by the post code (I entered it into 192.com) it is on Pylon Trading Estate, Cody Road, Newham.
Found it on the DHL website via Google! See
this page:
Docklands
Unit 6-7 Pylon Trading Estate
Cody Road
Canning Town
London
E16 4SP
192.com lists Unit 6-7 as being Motor City (Holdings) Limited, which is also shown (by 192.com) as being dormant. So perhaps DHL have only recently aquired it.
A number for Motor City at this address was 020 7474 6566. It still rings, so see if it's been taken over by DHL.