BSc and Mphys

most unis let you decide at the end of year 2 whether you want to continue onto the MPhys or do the BSc. You can only continue onto the MPhys if your grades at uni are good enough

unis vary as to whether someone on the BSc can change to MPhys part way through

It's worth applying for the M Phys if you are unsure cos you will then get the funding for 4 years - you can drop down to BSc later if you want to

This is something that can end up differing from uni to uni. Some unis will have different entry requirements for BSc and MPhys but most don’t in my experience. Functionally, BSc and MPhys will be the same for the first 2 years (3 in Scotland) and then differ slightly come the senior honours year. How they differ will vary by uni. It’s generally advisable to apply for the MPhys if you think there’s a chance you might want to do it as transferring down to the BSc is often easier from a funding perspective than it is going the other way. If you’re unsure or it’s unclear how it works at certain universities then it’s worth asking them if it makes any difference what you apply for.

If you look at the BSc and MPhys for my university (the University of Strathclyde) for example, you’ll see that they both require BBB in A levels for first year. What you apply for makes no difference to your application here though this may not always be true at other unis.