This applies to dealing with people borrowing into retirement, wanting interest-only mortgages and with irregular incomes.
The number of mortgages being introduced by intermediaries fell by 3% in Q3 2014 from Q2 to stand at 22.
Compared to the third quarter of last year however this still represents a 12% increase in average mortgage cases.
John Heron, managing director of Paragon Mortgages, said: “The market has seen significant structural changes following the Mortgage Market Review.
“This is a result of both the regulations themselves and the way the lending industry has responded to them.
“This could be one factor behind the softer levels of business that intermediaries are reporting in the third quarter.”
Buy-to-let lending to Q3 increased by 14% quarterly and 24% year-on-year according to CML data, as 43% of intermediaries think buy-to-let finance has become more available since Q2.
Heron added: “A healthy availability of buy-to-let finance is significant to maintaining a competitive and high quality private rented sector, so it is pleasing to see increased confidence amongst intermediaries, for this type of business.”