I work for NHS Blood & Transplant and commute a 14-mile round trip to the Filton centre when I’m not travelling all around the country.
Because it was built in 2008, it has: secure bike storage, showers, locker, a drying room and some emergency cycle kit (pump, WD40 etc) and a helpful e-mail group for cyclists. Most of this is just usual facilities co-ordinated into a bike-friendly package because of the lack of car parking… but it’s the thought that counts.
I don’t usually feel the need for shower. As others have said, unless you sweat like a beast and it’s warm weather; a good merino top and antipersperant will be your allies.