From West:

Come off M8 at Junction 19 towards Clydebank/Anderston.
Keep right at fork and continue onto Bothwell St.
Turn left at Hope St.
Turn right at W. George St.
Take first right onto Renfield St.
Turn left at Gordon St.
Turn right at Mitchell St.
Park in NCP multi-storey
From Mitchell St. NCP, walk along Mitchell Lane and at the end turn right onto Buchanan St.

From East:

Come off M8 at Junction 15 towards A803
Follow signs for Glasgow Cross
Turn right at Cathedral St, which becomes Bath St.
Turn left at Renfield St.
Turn left at Gordon St.
Turn right at Mitchell St and park in park in NCP multi-storey
From Mitchell St. NCP, walk along Mitchell Lane and at the end turn right onto Buchanan St.