Hi Cath201
I don't think there is a need to contact the insurer regarding this as you haven't been diagnosed with hypertension or been prescribed any medication, therefore it is not classed as a pre-existing medical condition, however, by all means if for reassurance you want to mention it then just give them a call, there should be no effect on the premium though.
Hope this helps
thanks
maxine
Maxine
maxine.baker @ moneysupermarket.com (remove the spaces)