Dunno, but any fool knows 4 is the tighthead lock and 5 the loosehead. Well, apart from Olyy.
As for tightheads - Rupert Harden was making Saxons squads not so long ago. That's where we are. Nowhere.
Long term, it should be ok - Thomas is promising for his age, there's been a lot of crap written. Ready now? Probably not. Collier, Knight, Brookes, Sinckler... all of these guys could come good. Swainston did well last year for Wasps, Cooper-Woolley is doing well for them this.
Not sure who thinks we're ok at loosehead though. Vunipola still takes quite a few scrum-bummings and Marler has an awful lot to prove. After them, Mullan and Wood haven't exactly spread the good news recently. After that - who?