Tall Womens Jeans

Long Tall Sally
Jean with inside legs from 34" to 40" (yes really!)
Dorothy Perkins
Dotty P's have a selection of 36" inside leg jeans in UK size 6 to 22 for most items. New items are added at DP every week and sell out fast.
Marks & Spencer
Jeans with leg length of up to 33", sizes 10-20 available.
M&Co
A collection of jeans in various inside leg lengths up to 35".
La Redoute
Branded jeans plus La Redoute's own brand jeans up to 86cm inside leg (34").
Cloggs
Ranged of branded jeans up to 36" inside leg including Levis, Wrangler and Lee.
Next
Variety of different jeans styles in leg lengths 33".
Lands End UK
US company Land's End tall jeans start at UK size 10 with an inside leg of up to 36".
Boden
Longer length jeans are 33" inside leg.
YOOX
Not specifically tall, but worthy of mention because many of the brands stocked have inside legs of 34". You will have to hunt around a bit mind you....
Top Shop
Topshop's online collection of tall trousers have a 36 inch leg. Selected styles are available with a 38 inch leg.
Tall Boutique
Tall denim clothing with 35" and 36" inside leg.