Increasing my Mortgage

I have a 100K tracker mortgage on a 300K house. I want to take 50K equity out of the house. Can I keep the tracker mortgage on the 100K and take the variable rate obn the 50K or will I lose the tracker mortgage altogether

Depends on your lender, maybe call them.

I done something similar with Ulster Bank and they will treat the 50K as a separate mortatage so you should be able to keep you 100k tracker,but other banks might be different