Speaking more specifically about pay: first of all, you probably won't get a lectureship straightaway. Most people these days start off on short-term contracts, quite often part-time. Even a permanent contract may well be part-time- but will almost certainly demand more hours than you're paid for.
A permanent fulltime lecturer's contract (almost certainly quite some way into your career) at my uni starts off at around 30k a year. 63k is the final salary for a senior lecturer: you might get there towards the end of your career if you are internationally known/have a proven track record in leadership (e.g. Head of Department)/have plenty of experience of devising programmes and supervising successful PhD students. That would normally be a balanced contract so you would be expected to teach, to research (and contribute to the REF evaluation) and do some admin apart from the admin associated with your teaching.
I have been over 20 years at my uni and have just secured a contract that would pay me 38k a year were it not that my department consistently claim that they cannot afford to pay me more than half-time.
For this 19k, I:
lecture/teach seminars 10 hrs/week at undergraduate and postgraduate level (+ extra, unpaid cover for colleagues who are off sick or on research leave)
devise my own courses on subjects that fit the department profile (which may or may not relate to my own area of expertise)
mark assignments and exams
second-mark and moderate for colleagues
deal with student evaluations
supervise 3rd year dissertations and PhDs
see students in my office hour
see students outside of my office hour (dealing with suicidal students at inconvenient hours is not a rarity)
have pastoral responsibilities for students I do not teach
do own research- on a 0.5 I am expected to contribute at least 2 pieces of research at international level per 7-year period (1 fairly thick monograph would count as 2)
organise publication of said research- these days publishers expect you to do a lot of the legwork
read and discuss the research of colleagues
write grant applications: as research is expensive and my department struggles to come up with enough money to reimburse a single rail ticket, I am expected to cover my research costs through grant which I can't count as part of my work hours
attend conferences (which my dept cannot afford to pay for- so I do)
do 20% admin (this might be something like being academic integrity officer- dealing with all plagiarism cases in the department)
supply endless amounts of information for university and national surveys/box-ticking exercises
try to keep on top of my field
try to work out how to pay for teaching and research material seeing that my dept has no money
Do I love my job? Yes, I do. Do I regret having chosen it? No, I don't. Would I recommend it to somebody else. Hmmmm...