BRITISH TELECOM RAISES 1986/87 PROFIT 11.7 PCT Year to end-March Shr 20.9p, a 22.3 pct rise Div 5.1p making 8.45p vs vs 7.5p Turnover 9.42 billion, a 12.4 pct increase Operating profit 2.35 billion, a 10.9 pct increase Pretax profit 2.07 billion, a 11.7 pct rise Fourth quarter 1987 Turnover 2.42 billion, a 8.4 pct rise Operating profit 629.0 mln, a 12.1 pct increase Pretax profit 555.0 mln, a 11.7 pct rise.