I operate into BHX most days, and agree with most comments about the slippery nature of the 15 stopend. Trying to do the right thing and keep runway occupancy down to a minimum does lead to faster than normal taxispeeds, turning off at the end of 15 at anything other than a crawl when it's wet, can leave you feeling somewhat out of control.
I would advise anyone who has had an experience where their heart has been in their mouth wondering if they are actually going to be able to make that left turn at the end, to file an ASR and tick the MOR box (assuming that your reporting forms are the same as ours). A few reports in the CAA's in trays will probably get something done about it ( if there is nothing in the pipeline already).
They are impressive furrows in the grass there, I must say !!.