Whirls,
I had exactly same as you but on a class 2 medical for PPL.
Then had a 24 h ECGr,stress test and echocardiogram.
All OK,but cost me around £650,this was 3 yrs ago,got my PPL licence back after 3 weeks.
I had to do it privately at Norwich University Hospital,tried the NHS but no luck.
Then March this year I got total heart block and had a pacemaker installed.
Got licence back after 6 weeks as PPL but flying on NPPL privileges,can fly up to three passengers anywhere in UK.
I could get my class 2 medical back after 3 months and fly PPL,but I thought why bother with the cost and hassle?
I spoke to the bods at CAA and they were most helpful.
A bit different for you,but anyway you should be OK and good luck.
Lister