KING'S LYNN, England (AP) _ Police took the advice of a convicted burglar and self-described royalist who pointed out security flaws at Sandringham House, a mansion where the royal family is spending its post-Christmas holiday.

Peter Howse, assistant chief constable of Norfolk in eastern England, said Sunday that the former burglar, Jeffrey Wolfe-Emery, ''indicated various things to us.''

''I'm absolutely confident that he could not get into Sandringham House now,'' Howse said.

Sandringham is a 274-room Jacobean-style house with 70 acres of gardens and a 20,000-acre estate, much of it kept for pheasant shooting. Queen Elizabeth II and members of her family arrived there Sunday for their customary six-week post-Christmas holiday.

Wolfe-Emery, 52, who lives in King's Lynn, 8 miles from the mansion, told reporters last month that he walked into the house when the royal family wasn't there and checked the security system.

Wolfe-Emergy, who has been jailed five times, was on parole and working as an electrician at the time.

When authorities warned him that he would be arrested if he went near the mansion again, he said: ''I am a royalist and a patriot and I did this to show that security around the royal family is too lax.''

Howse refused to say what extra security steps were taken. Wolfe-Emery had recommended installing remote-control video cameras like those at Wandsworth Prison in London, where he did time; ensuring that the cameras could not be inactivated by a thunder storm; installing a better burglar alarm system to detect anyone breaking in from the roof and improving the standby generator.