I'm travelling PE and notice that the plane is LHR config will this mean it will have the new furnishing.Also am I better checking at the airport or online for PE at Gatwick
At the moment it seems like you are on a LHR config a/c, however this of course could change back to a LGW before then, but if it doesn't, then yes, you will have the new PE seats and V-Port.
I would always use OLCI first to confirm your seats, you can still use the PE check in at the airport to drop your bags and even change seats if you want.
Neil