I don't think it would work that way in the UK.
Your consultant might be able to request the pathology be reviewed if they have some concerns about it.
If you want it reviewed, I think you'd need to have it done privately in another hospital. The NHS will make the samples available for this (probably just the slide images would be required).
You can have your whole diagnosis reviewed, and that typically happens if you request a referral to another hospital. Sometimes they will recheck scans or pathology, particularly if you were borderline for a treatment which might be considered, or a treatment requires more detail (such as focal treatments).