Biochemistry or pharmacology?

I think biochemistry would keep your postgrad options open if you changed your mind further down the line but if you're dead set on becoming a pharmacologist, I think pharmacology would be your best bet. Not entirely sure if you can go on and do pharmacology with a biochemistry

I'd go for Biochemistry. Like @Ash8991 said, it keeps your options open in case you realise you don't want to be a pharmacologist anymore... Also Biochemistry will have modules which are closely related to pharmacology (since they're quite similar degrees). Can always go for an MSc in Pharmacology afterwards.

To answer @Ash8991's last sentence, yes you can do an MSc in Pharmacology with a biochemistry degree. You can even do a (Pharmaceutical) Chemistry degree and end up doing an MSc in Pharmacology (that's what I've done haha)

Do you enjoy the course?

You'll have to wait till next year before I can answer that question, only going to be starting the MSc this October haha

Also from what I've seen whilst searching for graduate jobs, the majority of pharmacologist jobs require a degree in either Biochemistry or Pharmacology (many also say "relevant life/biological science degree"), so it's really up to you.

I think it’s ideal for me to go straight into pharmacology