In what we would call partial responders MRK has a different definition, SVR was 40-52% for boceprevir vs. 54-59% for telaprevir.

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In prior relapsers, SVR was 69%-75% for boceprevir vs. 83-88% for telaprevir.

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All were former Abbey customers, who were put on standard variable rate (SVR) mortgages after coming off fixed-rate deals.

BBC: abbey

But while existing borrowers will stay on that rate, new borrowers will be offered an SVR of bank rate plus 3.74% - in effect 4.24% - which is the same as at the Abbey, also owned by Santander.

BBC: Lloyds raises standard mortgage rate for new borrowers

The same is true of the assumption that the mortgage repayment will rise (it could be a longer-term fixed rate for example), or by how much - we have used the Standard Variable Rate (SVR), but the borrower may be using a mortgage which charges a different interest margin.

BBC: NEWS

Lenders' standard variable rate (SVR) deals are tending to be more attractive than new fixed-rate deals for owners, with interest rates having plunged in recent months.

BBC: Mortgage lending 'rises slightly'