Hi RedOnion,
Thanks for your reply, the labels were what was discussed over the phone and didn't make much sense to me either (still waiting for written confirmation of calculations) - but your explanation of 7 year and 10 year rates makes sense to me now. I suppose it's the downside of negative interest rates.
Does anyone have any experience of negotiating a reduction in these rates? KBC have said informally that the only way the fee could be waived would be to sign up for another 10 year fixed rate mortgage, but I'd be reluctant to tie myself in to (a) higher rates than currently available (c.2.3% for 3 year fixed) and (b) facing a possible future break funding fee if I had to sell in the future for some unforeseen reason.