DOUBLE PUSHCHAIRS

IM NEW TO THIS SITE, SO BE PATIENT WITH ME, I HAVE TWO GIRLS ONE 16 MONTHS AND ONE 4 MONTHS, I CURRENTLY HAVE A TWIN PUSHCHAIR BUT STRUGGLE TO GET IT ON THE BUS ETC AS I DONT FRIVE, SO LOOKING TO GET A TANDEM PUSCHAIR, WHICH WILL GO ON PUBLIC TRANSPORT, THROUGH SHOP DOORWAYS, EASY TO USE, PUSH ETC, PRICE NOT A MJOR ISSUE.
ANY IDEAS ANY ONE OR PERSONAL EXPERIENCES?:?