Ta lieh chooid eaghtyr y Reeriaght Unnaneysit jeant seose jeh Sostyn, as ee 130,410 kilometeryn kerrinagh (50,350 mi ker) er eaghtyr. Çheer injil t'aynjee son y chooid smoo agh ta çheer sleitagh ry gheddyn sheear hwoaie jeh linney Tees-Exe as goaill stiagh Sleityn Cumbria ayns Slyst ny Loghyn, Sleityn Pennine as cruink chlagh eayil ayns Slyst ny Binn, Exmoor as Dartmoor. She y Thaimish, y Severn as y Humber preeu-awinyn as inveryn Hostyn. She Scafell Pike (978 m er yrjid), as eh soit ayns Slyst ny Loghyn, y slieau s'yrjey. Ta ram baljyn as ard-valjyn mooarey ayns Sostyn as, rere Cryssyn Baljagh Mooarey, ta shey jeh ny 50 Cryssyn smoo yn Unnaneys Oarpagh soit aynjee.