The lender launched the products last month with a maximum loan to value of 65 per cent and maximum loan value of £250,000.
However, following intermediary feedback it has now increased the maximum loan allowed to £350,000.
The first charge residential deals are available as two-year and five-year fixes at 3.59 per cent and 3.99 per cent respectively.
The changes come as a result of increasing the scope of its automated valuation models (AVMs) which it has begun using in response to the coronavirus restrictions.