Re Brother HL-L3210CW, some reviews saying wireless can be temperamental. Also, that the software has been changed so it can force you to change toner even when it looks fine, and (for L-3550CDW) that all toners will deplete at the same time, making it expensive if you are mainly using black. Before buying, check the cost of any toner replacements, because this will be the biggest expense.
For your budget, you are looking at entry level models from Brother, HP and Kyocera.
The Kyocera ECOSYS P5021cdn for around £185 is within your budget, so might be worth you looking at.