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  Phil Voice November 25, 2012 at 10:05am

  It's difficult to see exactly Mick but the light brown dead grass maybe the aftermath of Red Thread (it certainly looks like a fungal disease).

  Judging by the very green tufts (a rye grass I'd assume) it looks like the more susceptible softer grass of fescue and bent have been hit while the ryegrass (which creates its own nitrogen and therefore remains green) looks healthy.

  The lawn surface looks compacted too.

  Aerating and light scarifying will help (it's too late in the season so the scarifying blades must not penetrate into the soil too far. 1-3mm is ideal).

  The remedy for Red Thread is an application of nitrogen. This can be done in autumn/winter but the product must be controlled release otherwise a rush of nitrogen fuelled growth will soon be burnt off by frost and cold.

  I'd say, looking at the conifers and panel fencing, that air flow is restricted, therefore making fungal disease much more likely.
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  Mick Gammage November 25, 2012 at 10:18am

  cheers Phil

  I thought it looked like a fungal disease rather than a drainage issue as the existing lawn area was lowered in height at the front edge tapering to nothing removed under the conifers and a thin layer of top soil added then the turf

  photo 3 is the left hand side and the sun get to this top corner late morning and is on the lawn all afternoon.

  
  
  
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  Dan Frazer Gardening November 25, 2012 at 11:15am

  I'd also get a soil sample and get a feel for how good the soil is - it may be very clayey/stony without a good amount of proper soil.
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  Mr Bradley Goodman November 25, 2012 at 11:20am

  I would say it looks like Red Thread, have a look around at any neighbours gardens it is a wind Bourne disease and has been very bad this year.
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  David Harris November 25, 2012 at 3:06pm

  Has this been caused from not enough water when it was the hot sunny period? No?

  dave

  garden fencing North London
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  Rich AGS November 25, 2012 at 4:38pm

  Cant see any red thread on there , if it was there it has gone . i would say theres a lot of fescue in there and to much surface water not the best place for  fescue to grow .