Bavin's Gulls or Sloe Grove Islands are a group of islands in the River Thames

River Thames

The River Thames flows through southern England. It is the longest river entirely in England and the second longest in the United Kingdom. While it is best known because its lower reaches flow through central London, the river flows alongside several other towns and cities, including Oxford,...

 in England on the reach known as Cliveden Deep above Boulter's Lock

Boulter's Lock

Boulter's Lock is a lock and weir on the River Thames in England on the eastern side of Maidenhead, Berkshire. A lock was first built here by the Thames Navigation Commission in 1772. The lock is on the western side of the river between the main Maidenhead to Cookham road and Ray Mill Island...

, near Maidenhead

Maidenhead

Maidenhead is a town and unparished area within the Royal Borough of Windsor and Maidenhead, in Berkshire, England. It lies on the River Thames and is situated west of Charing Cross in London.-History:...

, Berkshire

Berkshire

Berkshire is a historic county in the South of England. It is also often referred to as the Royal County of Berkshire because of the presence of the royal residence of Windsor Castle in the county; this usage, which dates to the 19th century at least, was recognised by the Queen in 1957, and...

. This reach of the Thames was described by Jerome K. Jerome

Jerome K. Jerome

Jerome Klapka Jerome was an English writer and humorist, best known for the humorous travelogue Three Men in a Boat.Jerome was born in Caldmore, Walsall, England, and was brought up in poverty in London...

 in Three Men in a Boat

Three Men in a Boat

Three Men in a Boat ,The Penguin edition punctuates the title differently: Three Men in a Boat: To Say Nothing of the Dog! published in 1889, is a humorous account by Jerome K...

as "unbroken loveliness this is, perhaps, the sweetest stretch of all the river...".

Bavin's Gulls consists of two large and two small thin wooded strips; they are part of the Cliveden

Cliveden

Cliveden is an Italianate mansion and estate at Taplow, Buckinghamshire, England. Set on banks above the River Thames, its grounds slope down to the river. The site has been home to an Earl, two Dukes, a Prince of Wales and the Viscounts Astor....

 Estate and are owned by the National Trust

National Trust for Places of Historic Interest or Natural Beauty

The National Trust for Places of Historic Interest or Natural Beauty, usually known as the National Trust, is a conservation organisation in England, Wales and Northern Ireland...

. Overnight mooring is permitted on three of the islands but no mooring or landing is permitted on the fourth which is a nature reserve.