Relations between the government and the designers of Wembley National Stadium were put under renewed pressure last week when culture secretary Chris Smith revived debate about spectators' sight lines for athletics in the stadium. uk chairman of stadium designer hok+Lobb, Rod Sheard, expressed frustration after Smith told a parliamentary select committee that sight lines will be inadequate for an Olympic bid. 'We're all pretty tired of the whole thing. The obscured part of the track would only affect spectators for 10 minutes out of a total of 62 hours athletics in an Olympics,' Sheard said. 'Wembley could still take on the Olympics.'