Cap colour can be pretty variable depending on soil type, variation etc. It looks quite rusted on the cap in the photo 2 but that may be the image quality. The best test is to smell it around the base of the stem as the B. impolitus species has a distinct iodine whiff, at least to my nose. Phillips indicates that the spore coliur is quite different, olivaceous snuff-brown in B. appendiculatus and lemon-yellow then lemon-chrome in B. impolitus. Another useful test.rich59 said:Thinking back to a local fungal foray a few weeks ago, when we looked at an Oak bolete, then I think this is not dark enough. The boletus impolitus - yellow form - seems to fit the bill better with the clay coloured cap (except in the huge mature specimens). I don't think there was any cracking on any of them.
So, not the best but still edible.
Next year I will run through some of the stated tests/ smells, and then try the cooking!