Join Date: Apr 2009
Location: Enniskillen, Northern Ireland
Galahad has the rules correct
The 3rd paragraph on pg 51 BRB says "except for the rule detailed in this section for each unit type, these units follow the same rules as infantry"
When moving assaulting models you "use the same rules as in the movement phase", that is; models in the way, different movement speeds, turning and facing etc. (Except terrain, as bikes under the assault section of their rules on page 53, "are not slowed by difficult terrain")