But why? I’ve done this before, why can’t I now ?A warning into the UK for work via PPE concession

A very simple word of warning on using PPE ( letters of invitation ) coming into the UK ... yet again another band refused entry , even though they had used exactly the same method before .. ... reminiscent of last years problems evidenced through a couple of different German bands at different ports of entry .. few links below on the stories at that time...
www.theguardia... rules#:~:text=German%20punk%20band%20'humiliated'%20after,due%20to%20post%2DBrexit%20rules
ORF FM4 Austria national Radio ( Web page in English )
fm4.orf.at/sto...
EGOFM Munich ( interview in English link on page ) webpage in German
www.egofm.de/r...
WDR Online ( In German )
www1.wdr.de/me...
​Previous Video link here for PPE
• Permitted paid engagem...