I appreciate that certain referee / AR teams are now established in the PL, but is there any policy regarding a VAR being allocated to a specific team? The reason I ask is that I noticed Tierney was VAR at Burnley when he advised Oliver to retract his penalty decision, and this next Saturday he's again VAR to Oliver at Arsenal. On Sunday, the situation is reversed with Oliver VAR to Tierney at Palace. It's not something I've been aware of previously. Is it planned or just convenience and coincidental?