Most of the lichens I've seen so far have been nitrogen-loving or N-tolerant (apart from a tiny bit of an Usnea) - so I'm not sure whether this could be Hypogymnia, but it looks rather like it.
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
Jenny - 'gardener' - Thanks for taking the time to look at this - very encouraging! Just had a look at your lichen website, which is great, with really clear photographs. I've always wanted to be able to identify lichens since I was a botany undergrad 30 years ago, but I couldn't find books that would help me then. Internet access is much more helpful, and the Opal lichen survey was a great way in for me.
Hi Chalkie - Frank Dobson's 'Lichens: An Illustrated Guide to the British and Irish Species' (5th edition 2005) is worth getting if you're seriously interested in lichen identification.
Alan Silverside's website is a useful resource: http://www.lichens.lastdragon.org/
Another website that provides details as well as photographs is LichenIreland: http://www.habitas.org.uk/lichenireland/splist.asp
Have fun, they can get very addictive!
Thanks again. Very helpful.
Lat/Lng: 52.1, -1.5
OS grid ref: SP3452