Absolutely mate, go for it.
I could be wrong but I think the point at which the DVLA would start taking a serious interest would be if your blood pressure systolic reading was 160 or above, I’m not sure about the diastolic reading but I wouldn’t have thought that 87 would be a big problem.
I don’t think a 24 hour blood pressure test will be accepted for the HGV medical so you will most likely need to have a BP test at the HGV medical, but if you can achieve reading like what you’ve mentioned I wouldn’t have thought there would be a problem.
Good luck 