I had this chair. It's the most comfortable chair I've ever sat in
Cherry Tree Furniture Executive Recline Extra Padded Office Chair (Grey Fabric) https://www.amazon.co.uk/dp/B07N7J582D/ref=cm_sw_r_cp_api_glt_fabc_ATD5XEG2SPTWE9702VYX
Cherry Tree Furniture Executive Recline Extra Padded Office Chair (Grey Fabric) https://www.amazon.co.uk/dp/B07N7J582D/ref=cm_sw_r_cp_api_glt_fabc_ATD5XEG2SPTWE9702VYX
It was from Amazon UK: https://www.amazon.co.uk/gp/product/B07N7J582D/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
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I use this because firstly I wanted something with very thick comfy arm rests and secondly I have a 4 month old kitten then tears everything apart, so no point spending too much right now (also why there is a basket on the PC tower, to stop her sitting on top and blocking air flow).
Doing a quick search, I myself could only find the same. Mostly white but with black accents.
However, I did find a couple full grey ones.
SECRETLAB TITAN SoftWeave® Fabric (Cookies and Cream)
https://secretlab.co.uk/collections/titan-xl-series#titan_xl_2020_softweave-cookies_and_cream
Cherry Tree Furniture Executive Recline Extra Padded Office Chair (Grey Fabric)
https://www.amazon.co.uk/dp/B07N7J582D/ref=cm_sw_r_cp_apa_i_aHwKFb6304MTF?_encoding=UTF8&psc=1