The slip, the screen and the person in between
A bet taken across a counter has three physical parts, and confusion about which one governs is behind a large share of retail disputes. There is the slip, which is the record of what was accepted. There is the wall of screens, which is a broadcast feed piped in from outside — shops were not permitted live pictures at all until 1986, when a dedicated service was formed to supply them, and the delay in that feed has its own history: greyhound races were timed to the second after a scam involving an accomplice at the track and a slightly delayed picture in the shop. And there is a member of staff, whose authority is real but bounded. Understanding which of the three settles a bet is the difference between a five-minute conversation and a six-week complaint.
What each part of the transaction actually does
None of this is specific to one chain, which is precisely why it is safe to write down. It applies to any licensed betting office, and knowing it changes what you ask for in the first thirty seconds of a disagreement.
The slip is the accepted terms
What is printed on it is what was taken, at the moment it was taken. Intentions, verbal instructions and what you meant to write are all far harder to evidence afterwards, which is why the paper is worth more care than it usually gets.
The screens are a broadcast
Pictures and on-screen results arrive from an outside supplier. They tell you what happened; they are not the shop's settlement record, and a shop screen showing something briefly is not by itself proof of how a bet should pay.
Staff decide within limits
Counter staff can accept, refuse, correct obvious errors and pay out up to whatever ceiling their employer sets. Beyond that ceiling the decision goes elsewhere, and pressing the point at the counter cannot move it.
Comfort is not neutrality
Free tea and coffee, form pages from the racing press and a bank of screens are all there to extend a visit. Recognising the design is not cynicism; it just means the length of a session should be decided before you sit down.