Another thing to bear in mind with holidays is that you usually can't take them here until you have acrrued them. So you may get four weeks holiday a year, but if you wanted to take say two weeks off, you wouldn't be able to do that until you had worked for six months.
When we first arrived here in August, my OH started work for a company that shut down for two weeks over Christmas. By then he had not worked for the company for six months, so was not entitled to two weeks paid leave. He had to take the time off, but didn't actually get paid for it all which was a real pain, especially as Christmas is such an expensive time of year here (think Christmas, summer holiday, school fees, club fees etc all due at the same time!) Some companies will let you go into "negative holiday" but not all.