Physics and engineering. Most first year physics and engineering courses are the same. It is easy to change from one to the other. I teach physics at a college. I teach A-level physics to students who wish to go into engineering or science at university. I have never been unemployed as a physicist. I am also an engineer. I served an apprenticeship in engineering before I did my physics degree. I also studied a masters and doctorate in engineering and physics later on. Armed with a degree in physics I had several physics jobs which paid between £30k and £100K (adjusted for today). Also there is a huge shortage of physics teachers in schools and colleges (the money is not that great but there are bonuses). I had a school teacher who taught GCSE Physics. He was a biochemist and was struggling with the course. He dropped physics at high school. In fact You would be hard pushed to find a science teacher at a high school who has a physics degree. At the moment, the government and the IoP are offering £20,000 bursary (grant) for physics graduates with a 2:1 or 1st class honors degree to train as physics teachers. This includes all fees paid. Compare that to going on a PGCE course in biology You will have to pay up to £9,000 for the one year course and have to get loans to support yourself too. That is how employable a physics degree is compared to most other courses.