Here are a few I have found quite recently and need a name if possible please.
1. Taken 18th Aug 2011. Under dead Hawthorn, acidic grassland-within mixed woodland, Northampton. Sulphur tuft
Hypholoma fasciculare possibly?



2. Taken 25th Sept 2011. On Calcareous grassland. Disused quarry area.
An
Agaricus species I'd imagine?



3. Taken in July 2011 - Heathland in yorkshire


4. Only picture I have - acidic grassland-within mixed woodland 18th Aug 2011 in Northampton, worth a try although I don't have any more information, apologies.