Gonzo
Agreed, if the likes of SYD can (and do) operate individual parallel approaches (they go on about it on the ATIS, just like LHR's permanent "wingtip clearance.....") to 34L/R with I'm pretty sure closer spacing than LHR's 27 L/R I struggle to see why LHR cannot do the same - unless it's a subtle Oz vs. UK vs. ICAO rules thing......