The availability check is the start of a broadband order. It asks for the building where the engineer would install the line.
What you enter
Enter the UK postcode, then choose the property at that postcode. The result is for that address, not for the whole postcode.
Ofcom predicted speeds are shown as Basic, Superfast, or Ultrafast. A Broadbent plan is suggested that may match. Those labels are explained in what Ofcom predicted speeds mean.
What happens next
The suggestion is not a confirmed line. The network is still confirmed before install. Full fibre may be Openreach, CityFibre, or another network the checker finds.
If that product is not available, the team contacts you with alternatives. If the checker has no prediction, you can still start from the full fibre, Superfast, Standard, or leased line pages.
What the check does not do
It does not book an engineer, take payment, or promise a go-live date. Those come after you choose a plan and the wholesale partner confirms the appointment.