Poole harbour oil spill washes up on wildlife haven Brownsea Island

Exclusive: National Trust concerned at danger to rich mix of ecosystems including lagoon, woodland, salt marsh and reedbed

Oil from the Perenco pipeline leak in Poole harbour has washed up on the shores of Brownsea Island, an internationally important wetland and marine conservation zone.

Nearly 200 barrels of reservoir fluid - a brine mixture that is about 15% oil - leaked into the waters of Ower Bay on Sunday from the pipeline sparking a major incident and urgent clean-up operation.