A recently taken WHT optical spectrum of the BAL QSO Q1303+308 shows intere
sting changes in the spectral characteristics of the absorption systems. In
particular, the equivalent widths of many of the broad absorption lines ha
ve markedly increased with respect to observations taken 15 yr earlier by F
oltz et al., with the more blueshifted components showing the greatest incr
ease by a factor of approximate to5 in optical depth. Perhaps the most rema
rkable feature of the data is that, in the rest frame of the quasar, the li
ne-of-sight outflow velocity of the clouds has only increased by approximat
e to 55 km s(-1) in a rest-frame time interval of 5-6 yr. Various examples
of doublet line locking are still visible in the system, and we present a p
rovisional model analysis of the spectrum showing that theories based on sm
all cloud velocity interactions via line locking can successfully explain t
he general appearance of the spectrum and its variability. Finally we highl
ight the need for further ongoing monitoring of this fascinating object.