SL7 is the furthest of the four outer outcodes from Slough, at roughly eight miles, and it is the one that reads most clearly as a town with a valley attached to it. Marlow gives the outcode its name; Marlow Bottom, Little Marlow, Medmenham, Bisham and Lower Woodend fill in the rest. The wider Slough weed delivery guide covers the area as a whole, and this page deals with what an SL7 address actually does.
What SL7 actually covers
Marlow, Marlow Bottom, Little Marlow, Medmenham, Bisham and Lower Woodend are the six names that make up the outcode. Marlow is the settlement at the centre of it and the one that gives the post town its name; the others are its neighbours, some of them villages in their own right and some of them stretches of ground along the valley.
Authority is split. Most of SL7 is in Buckinghamshire, with the Bisham end falling under Windsor and Maidenhead — a line that runs close enough to an address for the difference to matter. The wards are Bisham & Cookham, Chiltern Villages and Marlow. The civil parishes are Marlow, Great Marlow, Little Marlow, Bisham and Hambleden.
SL7 lies about eight miles from Slough, making it the most distant of the four outcodes on this route. The SL1 page covers the town at the centre of the area, which is a different proposition from the villages out here.
Why Marlow addresses don't fit a doorstep route
Two different kinds of place share the SL7 name, and a delivery round has to deal with both.
The Marlow ward covers the built-up town: streets where houses stand together, a centre where shops and homes sit above and behind one another, and a pattern of front doors that a driver can work through in sequence. This is the part of the outcode that suits a door-to-door route best, and even here the centre empties during the working day, when the people who live in it are elsewhere.
The rest of the outcode is a different problem entirely. Chiltern Villages is the wide ward that takes in the ground away from the town, and Great Marlow, Hambleden and Little Marlow are parishes covering long stretches of valley with comparatively few properties in them. Addresses are strung along lanes and reached by their own drives, and the gap between one delivery and the next is a journey rather than a walk.
Bisham sits on the boundary with Windsor and Maidenhead, which adds a practical wrinkle: an address on one side of the line can share an outcode with an address that answers to a different council entirely. The postal address shows no sign of it.
Taken together, the outcode is a town, several villages and a lot of open ground wearing one postcode. A route that depends on a person being at each door works in one part of that and not in the others, and a round cannot be split in half to suit. The parcel needs a fixed destination instead.
The locker that works for SL7
An SL7 order goes to a cabinet that you pick at checkout, chosen from the list your full postcode returns. Nothing is decided for you.
The reason that matters here is the gap between Marlow itself and the villages around it. An address in Marlow Bottom and one on the Bisham side are both SL7, and they may not be served by the same collection points. An address out towards Hambleden or Lower Woodend can be further still from the nearest cabinet that serves the town centre. The list is built from the postcode, so what you see is what actually covers your address.
If a property sits close to the Bisham boundary, or near the edge of Marlow Bottom, send the postcode and the serving points are checked rather than presumed.
Setup is done once and never revisited. Your age is confirmed at account level when the account is opened, and the wallet that pays for orders is filled by card or by USDT. No age check is repeated later, and none happens at the cabinet, because the parcel is placed in a compartment rather than handed over.
Delivery to SL7 costs £5 per order.
Where the week goes for a Marlow order
An SL7 order is packed and out of the building within a day of being placed, weekends treated the same as weekdays, so the day you order does not decide the day it starts moving.
It then travels through the InPost locker network rather than being driven to a door. Two to three working days after dispatch is when it is normally sitting in the cabinet you chose, with tracking following it from the start of the journey.
The cabinet then holds on to it for 72 hours from the moment it arrives. Given how far some SL7 addresses sit from the nearest collection point, that window is the sensible part of the arrangement: you can collect it on a day that suits you rather than on the day it happens to land, and you are not tied to a delivery slot that would only work if you were at home.
The delivery charge is £5 per order for every SL7 address, from the middle of Marlow to the far end of the valley, and nothing more is added.
Marlow questions we actually get
Does a Marlow Bottom address use the same locker as one on the Bisham side?
Often not. Marlow Bottom is its own settlement inside SL7, and Bisham sits at the opposite end of the outcode on the boundary with Windsor and Maidenhead. Both addresses are SL7 and both are covered here, but collection points are matched to postcodes, so the two can return different lists. Enter the full postcode at checkout and the cabinets that genuinely serve the address will show up.
Why does an SL7 address near Hambleden need the full postcode?
Because out this way the addresses are thin on the ground and the distances are longer. Hambleden parish and the Chiltern Villages ward cover a wide stretch of valley, and two neighbouring properties can be several minutes apart by road. The outcode cannot tell those apart; the postcode can. It takes a moment to enter and it decides which cabinet you are actually going to.
