Roma Finance has also made an agreement to double the lending facility with Cambridge Building Society to grow the medium term buy-to-let proposition.
The new product range includes buy-to-let products to support limited company landlords with rates from 3.04%.
All the rates are available for loan sizes up to £1.5m and these rates apply to standard properties.
Three in ten landlords reportedly see the COVID-19 pandemic as an opportunity.
Searches through the SmartrCriteria tool show that the criteria search combination for first-time buyer, first-time landlord and non-owner occupier has seen a 18% increase since the beginning of September.
Both deals were provided at 73% LTV with a six-month rate of 0.59% per month.
White Oak provides business loans, equipment finance and asset-based lending solutions to SMEs and mid-corporate clients across the UK.
The data from the ASTL shows that applications increased by just over 1% in Q2 2020 compared to Q4 2019.
Simpson previously headed up the structured real estate team at Santander.
The products are available as 2, 3 and 5-year fixed rates, with an automatic switch to a variable rate for a total term of 10 years.