National Australia Bank has elected to reduce variable home loan rates for some new borrowers by 25 basis points, using loans funded through the bank's Advantedge arm and arranged through mortgage managers.Advantedge yesterday advised mortgage managers of a cut of 25 bps in the delivery rate for new customers, with the new rate effective from next Monday. Customers with an existing Advantedge-funded loan will receive a cut of only 20 bps - in line with the drop in the standard variable rate for NAB customers with bank-branded loans. The cut was announced on Wednesday.The new Advantedge rates will also apply to loans provided by NAB's wholly owned mortgage origination businesses, Choice, Fast and Plan.NAB's UBank brand is yet to announce a cut in its home loan rate (at present 6.79 per cent), though UBank draws its funding from the Advantedge arm.A majority of NAB's above-system growth in home loans over the last year or so is the result of new business provided through its third-party network.UBank had already announced a cut of 40 basis points in its standard at call rate, to 5.61 per cent.