3 times recently I used ParcelForce - for UK , but one was to @Fionn on Lewis (a bit SE of Iceland😂).
Seriously good - a 20kg cab to Stockton, under 24 hrs, a bass to midlands, noon next day, and a pedal to Lewis next day! ('course it was a pedal, it was Fionn).
A while back I'd have said DPD but right now Parcelforce are my go-to. I'll add all were sans insurance!! We all know the risks but the exclusions and caveats make it an expensive and questionable expense.
My trick is add ALL the extras: tracked, signed for, txt on delivery, guaranteed next day or a refund... all the stuff that flags your package in their comp systems. I can't prove it helps but for a couple of quid my suspicion is it gets better attention through the systems.