A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 100,403
T3 immigration can take a long time.
Depending on your travel dates, the UK train strike could make taxis, Ubers, etc. very scarce.
I would not risk going landside.