As someone who just flew into Glasgow a month ago - yes, only self-service trolleys (but at least you don't have to pay for them!)
So unless you transferred in London, you'll get off the plane, go through passport control, pick up your bags, and walk through a long hallway (ostensibly customs "nothing to declare" although I have never ever seen a customs officer).
There won't be any porters or anything, but hopefully you can balance it all on a trolley or two!