he said 2 gang not 2 wayyou don't have to as such paul it travels up the 3 core
this 2g switch, is it the switch with the T&E+3core or just 3core?
if its the one with both cables then simply connect one switch to the other(so for example in L1 at the first switch you will have the feed in, common in the 2 way switching and the feed out to the other switch.), if its at the other end of the 3core then sadly it won't work as you only have a 3core cable taking common and two strappers so all cores used.
i hope that makes sense.