Gaps of 2 weeks or more require a gap reference, whether it was looking for work (not claiming benefit), traveling or anything else which can not be varified by am amployer, school, colledge, uni or state benefits.
I have heard of gap references for people who were out of work for 18 months and not claiming benefit following redundancy as they didn't want to claim. This is fine as long as you can account for and have independantly verified what you were doing.
GA