Phonetics and the IPA 7, Exercise 1: the GOAT set

RP                /əʊ/
General American  /oʊ/
Scottish English  [o~oʊ]

In common: all three are rounded back vowels or glides towards one, used for
the same words (goat, home, toe, choke, joke).
Different: RP starts with a central vowel [ə]; GA starts with a mid back
rounded vowel [o]; the Scottish value ranges between a pure [o] and the
diphthong [oʊ]. (Whether each really has a glide is accent detail the
source gives only through these symbols.)