British ferries range from state-contracted lifeline vessels to a single boat run by an estate across an estuary, and the way they publish reflects that. CalMac issues seasonal PDFs months ahead; an islands council posts a fare table for the year; a tidal foot ferry puts out a sheet each month with the high waters and the hours that follow from them.
Every timetable and fare here is taken from that primary publication, never from an aggregator, and carries the date it was read. Where the operator publishes only a PDF — which in Scotland is most of the time — the PDF is archived alongside the page so the figures can be checked later against what was actually said.
Operators contradict themselves often enough that it needs a rule. A port page may give a different check-in time from the timetable it links to; a winter document may be headed with last year's date; a route description may name a mainland terminal the current PDF never mentions. Where that happens, this site sets out the contradiction rather than quietly picking a side, and publishes no figure it cannot stand behind.
Each crossing carries a next-check date and is looked at again before it lapses. What no site can tell you is whether today's sailing will run: wind and swell cancel British ferries at short notice, and the operator's own notices are the only source for that. Lauttainfo UK sells no tickets and is independent of every operator; advertising pays for it.