There's something about Madonna and photographers. A brawl broke out yesterday between her bodyguards and photographers at London's Heathrow Airport when she tried to slip into Britain. The scene reportedly got so ugly that Madonna was in tears. At least her husband, actor Sean Penn, who has punched photographers on two continents already, was not with her.

Witnesses said the trouble started when the swarming photographers prevented Madonna from getting into her car, and her bodyguards moved in to clear the way. After some pushing and punching Madonna finally got in and her entourage left with a great squealing of tires. Free-lance photographer Dave Hogan suffered a sprained ankle when he slid off the roof of her limousine. Madonna and Penn had been in West Berlin for a film festival. The Prince's Texas Tour

Prince Charles visited a minority-owned business, a day-care center in a housing project and two homes in an urban renewal area in San Antonio yesterday as he wound down a five-day, four-city tour of Texas to help celebrate the state's 150th anniversary of independence from Mexico. The prince was accompanied by Mayor Henry Cisneros on a tour of Mil-Tronics, a minority-owned factory that makes electronic circuit boards.

The Mil-Tronics employes gave Prince Charles a mounted circuit board on a plaque, and Clarissa Rodriguez, 9-year-old daughter of Mil-Tronics President Gene Rodriguez, gave the prince two leather western belts for his sons William and Harry.

Earlier a 62-year-old Hispanic warehouse worker pushed his way through a cheering crowd and halted the prince of Wales' entourage outside the electronics assembly plant.

"Charlie! Say hi to your grandmother from Jimmie Mesquiti," Mesquiti yelled. He told the prince that he had met the Queen Mother in London on D-Day. "She came to the docks to wish me and the boys the best of luck. I was headed to Omaha Beach. She waved at me, and I saluted her. She was with her husband, King George."

The prince hesitated for a moment, then replied he would be delighted to take back Jimmie's greetings. "I will do just that," he said. "I will give your regards to the Queen Mother. I'm sure she will be glad to hear you are doing well." End Notes

"Bloom County" cartoonist Berke Breathed, who underwent surgery for a fractured back after his ultralight plane crashed last month, was released late Thursday from St. Joseph Hospital in Albuquerque. Hospital spokesman Bob Fenton said Breathed, 28, is now able to walk and is expected to resume work soon on the strip, which is carried in 870 newspapers . . .

Heiress Mollie Wilmot, better known as the socialite who put up with the rusty Venezuelan freighter Mercedes I beached in her Palm Beach, Fla., back yard for 104 days, has sold the movie rights of her saga to Walt Disney Productions for an undisclosed amount. Producer David Permut said, "We're thinking of tailoring it for Bette Midler" . . .

Nancy Reagan's hair stylist, Robin Weir, Self magazine and L'Oreal will be on the lookout for local, nonprofessional beauties -- aged 16 to 75 -- tomorrow from 1 to 4 p.m. at Weir's salon, 2134 P St. NW. Twelve models will be chosen to participate in a complete makeover at the Beauty Expo sponsored by Peoples Drug Stores, to be held at the D.C. Convention Center March 1-2 . . .

Former Arena Stage company member Robert Prosky, who plays Sgt. Stanislaus Jablonski on NBC's "Hill Street Blues," will dispatch 2,000 Credit Union National Association members Monday to lobby lawmakers on the Hill. The CUNA, which represents more than 90 percent of the country's 18,000 credit unions, is holding its annual governmental affairs conference -- appropriately dubbed "Hill Street News" -- Monday through Wednesday at the Washington Hilton Hotel. Among those addressing the association will be Sens. Daniel Inouye (D-Hawaii) and Steven Symms (R-Idaho), Rep. Jim Leach (R-Iowa) and Jimmy Molloy, doorkeeper of the House of Representatives . . .

Alice McGill, who performs "Sojourner Truth Speaks" at the Smithsonian Resident Associates' Discovery Theatre Tuesday through March 8, will be presented a first-day issue of the Sojourner Truth commemorative stamp Monday at the L'Enfant post office by personnel director Rose Brown, in celebration of Black History Month . . .

Bob Hope's son, Tony, 45, a Republican lawyer from Northridge, Calif., yesterday announced his candidacy for the congressional seat currently held by Rep. Bobbi Fiedler, who is giving up the seat to run for the Senate. Fiedler's top aide and fiance', Paul A. Clarke, still faces a charge of trying to bribe another candidate to drop out of the Senate race . . .

Grover's Mill Pond, the site where Martians "landed" during Orson Welles' legendary 1938 broadcast "The War of the Worlds," sending tremors of panic nationwide, has been donated to the New Jersey Conservation Foundation, which plans eventually to turn it over to West Windsor Township to be used as a park.