Complex sentence: After deregulation buy to let investors, with substantial collateral were able to mortgages at more favorable rates than than owner occupiers, as lenders were permitted to offer lower interest rates for mortgages with low loan to value ratios.
Split into simpler sentences: After deregulation buy to let investors, with substantial collateral were able to mortgages at more favorable rates than than owner occupiers. As lenders were permitted to offer lower interest rates for mortgages with low loan to value ratios.