Masters and Bachelors

Do people studying for their masters in computer science study alongside people studying for their bachelors? Like in the first year? I'm just wondering if I were to do my Masters and then drop down to the Bachelors, would I be studying with other people?
This is the Integrated masters by the way.

If you are doing an integrated masters your first 3 years are a standard Bachelors and if you meet the grade required you automatically go on to do a masters in the same uni. You then usually do much more specialised modules that rely on the previous 3 year's undergrad work. If you are on the integrated track, during your undergrad years you will be studying alongside people who haven't chosen the integrated track, because there's no difference in the undergrad element.

Oh okay so I'm understanding that say in my first year I decide I don't want to do an Integrated Masters anymore and drop down to the Bachelors, I would still be studying with the same people in the second year?