I remember 05/23 being resurfaced in 1991/2 period ? It was always interesting to watch when 23 was in use for landing in strong S to SW winds. A few aircraft preferred the longer runway 27L which gave ATC the challenge of trying to work out if separation could be maintained during landing between an arrival on 23 against an arrival on 27L where the headwinds and therefore ground speeds were very different. Also the opening of T4 (April 1986 I believe) and the close proximity of runway 05/23 was not ideal operationally. A week or so before T4 opened runway 05 was in use due strong NE winds and everyone was thinking "I hope this doesn't happen after T4 opens".