The last couple of packets i've bought seem to be re-branded as 'Storm 7' and seem no different to L&M Green. Is this a new thing? 

L&M Blue (Standard size) is still available, which is what I smoke. It is my experience that the counter staff often get them mixed up with Black storm (very similar packaging). Once I have to pointed out the mistake, I will be given L&M Blue

Storm 7.1 is the smaller version of Black Storm.  

You have to check when you buy them,they look very similar,i was in a rush,and ended up with the awful menthol ones,if you encounter problems,always handy to have a pack of the old "LM see fah' with you.I like them not too strong,if i smoke any of the red ones,wonder,LM deang, or God forbid the hellish Krung thip,i nearly cough my gut's up next day.