Moved from Mortgages and Buying and Selling Homes since it's an investment property mortgage query and that forum is for owner occupier mortgage issues.
The LTV as well as the amount of the loan affects the rate : If it is 85% ltv and over 500k loan - than ICS and BOI will give you a tracker rate of 4.75 .
If the ltv is 80% or less - then 4.7% is available from Bank of Scotland if you borrow over 750k! Ulster Bank and First Active will give you 4.75 - no min loan amt.