Weight 87 to 79kg intend to take it down to 74kg. gym/food change. my bp down to 116-126/65-68 pulse 45-56. should i ask my gp to alter my medicine.

Yes: That is a significant change in weight and lifestyle. Congratulations on what you have accomplished so far. It looks like your need for anti-hypertensive medication has decreased and you should discuss this with your gp.

Yes: Yes i think you should get this adjusted by your doctor. When he sees your good progress progress you'll probably get a pat on the back which is always nice.

BP meds: Yes, as you drop weight and achieve consistent diet improvement and exercise, your need for amlodipine and losartan and atorvastatin will diminish; your BP values are low now - perhaps too low - and your pulse is very low, too.