'Brownsea Island, in the middle of Poole Harbour, literally brims with adventure,' promises Joanna. 'This is Famous Five country and is perfect for a spring picnic with inevitable lashings of ginger beer.'
Details Poole Harbour, Dorset, BH13 7EE (01202 707744; www.nationaltrust. org.uk). Ferries to the island run from Poole Quay and Sandbanks Jetty and cost from £5 per adult and £4 per child, return (01929 462383; www.brownseaislandferries.com)