Other LFS users, including the Bank of England and the Office for Budget Responsibility, have expressed concerns about the quality and have noted the volatility of the UK level estimates.
Mae defnyddwyr eraill yr LFS, gan gynnwys Banc Lloegr a'r Swyddfa Cyfrifoldeb Cyllidebol, wedi mynegi pryderon am ansawdd ac wedi nodi anwadalrwydd amcangyfrifon ar lefel y DU.