Thanks for the replies so far! Glad it seems to be something of interest to people, definitely a need for it.

I'll definitely be giving the bike a service and putting aside those tools that I use, but I'm also thinking about the kind of additional tools that people tend to need or find useful on the road, for example tyre irons (type, length), wrenches etc..

So, what do people find is essential or unneccessary for a trip? What should I not leave home without?