New opiate and crack-cocaine users: characteristics and trends 40 
 
Cornwall and Isles of Scilly 0.6% Manchester (DAT) 1.6% Surrey 0.9% 
County Durham 0.7% Medway towns 0.4% Sutton 0.3% 
Coventry 0.7% Merton 0.3% Swindon 0.4% 
Croydon 0.7% Middlesbrough 0.6% Tameside 0.5% 
Cumbria 0.8% Milton Keynes 0.3% Telford and Wrekin 0.3% 
Darlington 0.2% Newcastle upon Tyne 0.8% Thurrock 0.2% 
Derby 0.8% Newham 1.0% Torbay 0.3% 
Derbyshire 1.3% Norfolk 1.3% Tower Hamlets 1.2% 
Devon 0.7% North East Lincolnshire 0.5% Trafford 0.3% 
Doncaster (DAT) 0.8% North Lincolnshire 0.4% Wakefield (DAT) 0.9% 
Dorset 0.5% North Somerset 0.3% Walsall 0.7% 
Dudley 0.7% North Tyneside 0.3% Waltham Forest 0.5% 
Ealing 0.9% North Yorkshire 0.7% Wandsworth (DAT) 0.6% 
East Riding of Yorkshire 0.4% Northamptonshire 1.1% Warrington 0.3% 
East Sussex 0.7% Northumberland 0.5% Warwickshire 0.6% 
Enfield 0.5% Nottingham (DAT) 0.9% West Berkshire 0.2% 
Essex 1.5% Nottinghamshire 1.5% West Sussex 0.7% 
Gateshead 0.6% Oldham 0.4% Westminster 0.9% 
Gloucestershire 0.9% Oxfordshire 1.1% Wigan 0.6% 
Greenwich 0.6% Peterborough 0.4% Wiltshire 0.4% 
Hackney 0.9% Plymouth 0.7% Windsor and 
Maidenhead 0.2% 
Halton 0.2% Poole 0.2% Wirral 1.0% 
Hammersmith and Fulham 0.5% Portsmouth 0.5% Wokingham 0.1% 
Hampshire 1.4% Reading (DAT) 0.4% Wolverhampton 0.8% 
Haringey 0.6% Redbridge 0.5% Worcestershire 0.9% 
    Redcar and Cleveland 0.4% York 0.4% 
 
We then combined the above with the DIP data to assess the geographical coverage in each 
year. For each year the coverage percentages (above) were summed for all LAAs that provided 
data for that year. The results in the table below show that whilst the first year of DIP only 
covered around a quarter of the OCU population, from 2006 until its final year, LAAs covering 
between 94 and 98 per cent of the OCU population were recording DIP tests.