The very first thing is to quote the Hatted Botanist: " you can always eat anything, but it maybe only once ! ". So be careful, and remember that poison can stick to your fingers, and then if you lick them ... say no more.
Apparently, there are some 15,000 types of fungi which grow in Britain, so there are probably lots more to be found in Linn Park !
The Linn Park Nature Trail Guide Book has some mentions of them:
- In Summer, at Post One, keep an eye out for Fly Agaric Toadstools, and Shaggy Parasols,
- Autumn, at Post Two, Fairy Ring Toadstools, and Warted Puff Balls.
A guide to Mushrooms that seems to us to be useful is here: https://www.wildfooduk.com/mushroom-guide/
Below are some of the Mushrooms, Toadstools, & Fungi which have been found in Linn Park, some recently, and some reported back in the 1960's.
Unknown - PLEASE help to name them - Email: Gents@linnpark.org.uk
Birch Bolete
It's Latin name is Leccinum Scabrum. Thanks to Steve McCan for the photo.
Birch Polypore
Thanks to Aileen MIlne for these photographs taken in late November 2020.
And to Steve McCann for this one: he gives its Latin name as Fomitopsis betulina. 
Chicken of the Woods
undefinedThanks to Steve McCan for the photo. It's Latin name is Leccinum Scabrum. 
Common Puffball
Thanks to Steve McCan for the photo. It's Latin name is Lycoperdon perlatum. These are sometimes called "Warted Puffballs", and are mentioned in the Linn Park Nature Trail Guide Book, Autumn, at Post Two.
Dryad’s saddle
Thanks to Steve McCan for the photo. It's Latin name is Polyporus squamosus. 
European blusher
Thanks to Steve McCan for the photo. It's Latin name is Amanita rubescens. 
Fairy Ring Toadstool
See The Linn Park Nature Trail Guide Book, Autumn, at Post Two for more on this sketch. 
Fly Agaric Toadstool
See The Linn Park Nature Trail Guide Book, Summer, at Post One for more on this sketch.
And thanks to Aileen Milne for this great collection on 16th October 2021.
Funnel Caps
Photographs of what Rennie things are Funnel Caps [Clitocybe sp] growing on a tree root on its way to the sea. Taken in late September 2017.
Horse’s hoof fungus
Thanks to Steve McCan for the photo. It's Latin name is Fomes fomentarius. 
Innotus
Thanks to Aileen MIlne for these photographs taken in late November 2020. According to Wikipedia, Innotus is a "genus" of some 80 to 110 types depending on classification.They look like "ears", hence the name - ino meaning fibrous and ot meaning ear.
Jelly Ear Fungus
Thanks to Aileen Milne for these incrediable photos taken on 23rd February 2024.
Oyster Mushroom
Thanks to Steve McCan for the photo. It's Latin name is Pleurotus ostreatus. 
Porcelain Mushroom
Thanks to Steve McCan for the photo. It's Latin name is Mucidula mucida. 
Scarlet Elf Cap
Thanks to Aileen Milne for these photographs taken in early March 2021
Sessile Earthstar
Thanks to Steve McCan for the photo. It's Latin name is Geastrum fimbriatum. 
Shaggy Inkcap
Couple of photos, one of which was used to ask Google Images what it thought . . . Shaggy Inkcap. What a name ?
Otherwise called "Coprinus comatus". For more consult Wikipedia.
"Shaggy" means the distinctive woolly, scaly surface of its cap.
Shaggy Parasol
See The Linn Park Nature Trail Guide Book, Summer, at Post One for more on this sketch. 
Turkey Tail
Thanks to Steve McCan for the photo. It's Latin name is Trametes versicolor. 
Velvet Shank
Thanks to Steve McCan for the photo. It's Latin name is Flammulina velutipes. 
Woodear Mushrooms
Thanks to Aileen MIlne for these photographs taken in late November 2020.
Yellow Stainer
Thanks to Steve McCan for the photo. It's Latin name is Agaricus xanthodermus. 