Hi there. . . just wanted to ask, what is the UK equivelent of the US army special forces?

just wondering becasue i'm a brit pakistani applying for royal navy, and i'm a general a fan of military stuff, specially comparing similar miltary units, and i ask this question because if SAS is = Delta and SBS = SEALS and we brits call these special forces , while our US friends call theirs Special Operation forces, and our US friends have US Army special forces, and wanted to know their their equal because its buggin me heheh