UK citizens do not require a visa for entry into Israel for up to 3 months. You will be given an entry card on arrival, and you will need to keep this until you leave, even if your passport is stamped.
Your passport must be valid for at least 6 months from your date of entry.
There are strict rules about the border control between Israel and the Occupied Palestinian Territories. For more information, please read the advice on the GOV.UK website.
If you have any other queries about travel between Israel and the Occupied Palestinian Territories, please contact the Embassy of Israel directly.