It's unclear what university or course you are intending to study as you didn't specify this.
Also usually semester timings etc are listed on the university calendar which is invariably publicly accessible on their website, and how many days you are on campus with timetabled activities will vary year on year and term on term and what someone last year had as a timetable will at most universities not end up being the same timetable as this year.
In general UK unis will schedule lectures between 9am and 5pm Mon/Tues/Thurs/Friday and 9am and 1pm on Wednesdays (to facilitate students participating in societies, particularly so sporting societies can schedule practice periods and competitive events etc). You can end up with 9-5 lectures one day and no lectures on any other day, or you could have a single 1 hour lecture each day for the whole week.
The only university I know of which for some courses has relatively "fixed" timetables is Cambridge for natural sciences. Incidentally also an exception as they schedule lectures on Saturday mornings as well for NatSci.