Should I pay off early or put my money to use? [23, M]

I decided that I wanted to study at a vocational college, receiving a scholarship for £3000 per year against my fees. To pay for the remainder of my fees, my mum took a low-interest bank loan on my behalf, which I pay back at a monthly rate of around £150. (3% interest loan - fixed rate). This is to be payed over 36 months and I am currently on the 11th month. I have now graduated and still have a total of around £3500 left to pay off - I recently picked up a second job ontop of my current job bumping my hours over 40 hours a week.

Now the question, is it better to:

A: Increase my monthly payments and pay off the loan early.
B: Just continue to pay the set monthly payments for another two years?

I ask this because if for example I had an income of £800 pm, payed £150 I would be left with £650. I live rent free although I'm thinking about offering to pay towards utility bills (mortgage is paid on house) Couldn't I put this money to work for me, seeing as now matte how quick I pay the loan, the same amount will be paid.


Apologies for the weird layout of this post. Need some thoughts / opinions / advice on this
If any info is missing, ask!