Port Lane Plat was an arable field of about half an acre, situated in the corner of Neltro Common Field on the west side of Port Lane. In the Tithe Award it was measured at 2 roods and 35 perches; described on the OS map as 0.654 acres.

aka The Butts - this name comes from the fact that it would have been where the men of the village conducted their compulsory archery practice in mediæval and Tudor times (the butts being earth banks behind the targets to stop stray arrows).

The Butts was owned by John Rogers in the mid-18th century. When John Rogers died in 1774, The Butts passed to his son, Henry.

According to the Manor Court records, The Butts was surrendered in 1788 by Henry Rogers of Windlesham to John Loveland (who was admitted in September 1789). However when Henry Rogers died in 1794, The Butts passed to his son James.

In 1852, James sold The Butts (now known by the name of Port Lane Plat), along with other land, to Richard Collyer. Richard died in 1855 and left the bulk of his estate in trust for his son William James Collyer (Thomas Blake La Coste and Rev. James Jerram were the trustees).

When James Jerram, the surviving trustee, died in 1885, he devised Port Lane Plat (and the other trust properties) to Charles Carlos Clarke of Esher.

Port Lane Plat is now covered by the houses of Arethusa Way.