Additional borrowing with mortgage - Can I remain with one company but get extra from another

OK. Basically, I want to borrow an additional sum on my mortgage.
Existing lender is happy to do so, leaving my existing balance (£120K) at my low rate of BS+1.1%, but then providing additional borrowing of 20K at 4.09%.
However, I was thinking. Am I obliged to remain with my lender for this? Obviously, I don't want to move my entire mortgage off my great tracker rate, but can I go to someone else for the additional 20K? Im guessing not.
Am I right that only option is for additional borrowing via existing lender or secured loan (not mortgage through someone else)?
Reply to
If you can find any lender who is willing to make a second mortgage subordinated loan and at a better rate, then go for it.

Reply to
Anthony R. Gold

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