BRITISH AIDE CRITICIZES U.S.PROTECTIONISM A senior British official said that protectionist bills being considered by Congress could trigger retaliation by the European Community (EEC) and threaten the global trading system. Paul Channon, secretary for trade and industry, said if Congress passed legislation to curb textile imports, which would hit EC shipments as well as shipments from major Asian textile producers, "the community would have to retaliate." His comments echoed those made yesterday by Belgian Trade Minister Herman De Croo, who said if the bill passed, the community would retaliate by imposing taxes on U.S. exports. Channon made his remarks at a news conference after two days of talks with Reagan Administration officials and members of Congress. De Croo was also in Washington for trade talks. Channon said there was a greater protectionism sentiment in Congress since his visit here last year as Congress and the Administration tried to find ways to reduce the U.S. trade deficit, which last year hit a record 169.8 billion dlrs. Channon also called for greater EC-U.S. cooperation to force Japan to open its markets to foreign goods. Channon said Japan's trade surplus is causing everyone problems - its surplus with the United States last year was 51.5 billion dlrs and with EC nations, 16.7 billion dlrs. "The more united pressure there could be, the better," he said. Channon also called for increased U.S.-EC cooperation to avoid trade disputes. He said the two sides narrowly avoided a confrontation earlier this year over lost grains sales when Spain and Portugal joined the community and its liberal imports regulations were tightened to conform to EC standards. "But if both sides drew back from the brink that time," he said, ""it does not mean that they would do so on another occasion." Channon added that "There is increasing reesentment in Europe over the U.S. tactic of negotiating under the pressure of unilaterally imposed deadlines." He said other potential conflicts are already in sight - alleged European government subsidies of Airbus aircraft and taxes on fats and oils - and "the commuity and the United States must therefore learn to manage their relations better." He said another bill to let the United States retaliate against a nation if that nation's market was not open to U.S. goods would bypass the trade pact GATT (General Agreeeement on Tariffs and Trade) as an arbiter of trade practices. He said foreign trade law should be judged by GATT and not by the United States, adding "if the (trade) law is to be interpreted by the United States and not by the GATT, what is to happen to the rest of us?"