Spread of OPM in 2015 is greatest since 2006. Twenty-four of London's 32 boroughs and four districts in Surrey recorded breeding populations. Nests were found up to 5km from the outer limit of the 201 k infestation. This compares with a previous average annual spread of 750m.Three separate infestations now affect London and Surrey: Main west London outbreak (2006) in 17 London boroughs and 3 Surrey districts Bromley outbreak (2012) also in Croydon and Lewisham.
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