Lounge access in LHR
We will be arriving to LHR from the US in Club World so I assume we have access to the BA arrivals lounge in T5. *HOWEVER, we believe we will be connecting to a flight leaving out of T4. We will have luggage that we may need to collect, or that will hopefully be tagged through since it will be BA all the way (Vueling operated on BA metal).
If we don't need to collect our luggage, any suggestions for lounges at LHR that we can access since it doesn't make sense to clear customs just for the arrivals lounge (or maybe it does)?
As noted, we will be coming in on BA Club World but departing economy. We have Amex Platinum (Centurion Lounge), Chase Sapphire Reserve, and Priority Pass lounge access. Can we go to other terminals for the lounge? Looks like we have to clear security between terminals. We may have 7 hours to kill before our connection. Unless things go swimmingly and Vueling allows us to fly standby on a flight departing 2.5 hours after arriving.