Twitter is quite well known for having parody accounts on it, such as @BorisJohnson_MP, which goes by the name "Parody Boris Johnson" or @HonestGoogle, which uses the name "Honest TeamYouTube ᵖᵃʳᵒᵈʸ". The difference you can spot with these accounts is that they identify themselves as parodies. Without identifying as a parody, an account tends to look like immitation, rather than parody.
His Twitter handle has been spoofed in clever ways in some cases, so if you are in doubt, just double check, and if you do see an imposter, you can report that account to Twitter.
WRITTEN & EDITED BY Three of Seven - rena.hobden@ufplanets.com