These are products I have used or are using for my marathon training.
Running Shoes
Vibram Spyridon
Freet Meta Ayr
http://freetfootwear.co.uk/index.php/2014-02-21-15-10-24/4-1-shoes
Karrimor Duma Trail Mens Running Shoes
http://www.karrimor.com/karrimor-duma-trail-mens-running-shoes-213144?colcode=21314492
Clothing
Skins DNAmicThermal Tights
https://www.skins.net/uk/dnamic-thermal-mens-long-tights.html
2XU Compression Calf Guards
http://www.2xu.com/uk/p/compression-calf-guards/UA1987b.html?dwvar_UA1987b_color=BLK_BLK#start=1
Under Armour HeatGear Compression Leggings
http://www.underarmour.co.uk/en-gb/mens-ua-heatgear-armour-compression-leggings/1257474.html
Food and Drink
Ketone IO – excellent beta product, I have high hopes for this company.
http://ltdlabs.com/
Equipment
IAMRUNBOX backpack.
https://iamrunbox.com/en/products/3-backpack-lite.html#/color-orange