I graduated from Biomedical Science with just barely a 2.1 last year, I am currently a MSc student in cancer, due to some personal issues I had problems with my lessons and lab work, I was even unable to attend the lectures and lab for over a month. As you can imagine this has set me back quiet a bit and although I was aiming for a merit I am pretty sure I am going to end up with just a pass.

This brings me on to my question, is it worth it to do an MRes after my MSc in the same field ? I am sure that the extra 12 months of lab experience from an MRes would make me much more prepared for a PhD, given that I also did not have a lab based project in my undergrad.I am curious if this would effect my PhD applications in a positive or negative way.

Any comment/advice is much appreciated.

Hi there.
Even though I am not knowledgeable about how things work in your field of study, I feel that an Mres would not offer much in your case. Did you not have any mitigations while doing your taught masters?
I received a pass in my masters (taught course) and I still managed to complete a PhD in the end. The problem in my case was not the fact that I was having personal difficulties. It was simply the fact that I had language difficulties, and I struggled to manage my homework.