Hi rok87,
Thanks, that actually may be the most reasonable choice. 5 pounds for a 2 minute ride is actually expensive, at least in terms of taxi rides here in Portugal. Moreover the taxi driver may not be very pleased to do a 2 minute job lol. In Portugal you would surely hear him or her complain
But you really cannot put a price on arriving early and without stress, so yeah, catching a taxi seems a good choice
EDIT: By the way, I've seen that breakfast at the Premier Inn Fareham is served at TGI Fridays. My tests begin at 9 AM and I'd like to arrive at 8:30 AM. Is TGI Fridays open for breakfast at 8 AM? Thanks.