Saturday & Sunday Prem/Pro12 previews

Wasps v Exeter (Sat)

Harlequins v London Irish (Sat)

Bath v Northampton (Sat)

Worcester v Leicester (Sat)

Glasgow v Leinster (Sat)

Treviso v Scarlets (Sat)

Zebre v Ospreys (Sun)

Dragons v Munster (Sun)