Ricardo, I don't have any experience in this, but a while back on this site I recall having seen a post by someone who was left in a very difficult lurch. Moved across...then got made redundant (laid off). There was no package in place to allow for this and the person, as I recall, had to find his/her own way back. For sure I'd have some sort of clause about that possibility in there.
Guildford is close enough to London to commute on public transportation, so this may not happen, but, at least a few years ago, one of the standard perks was to get a company car. Very status. Would do no harm to ask about; they might even expect the question. However, due to recent changes in taxing, this perk is not the benefit it used to be and many companies are stopping the policy. I mention merely because it's been common here, but also being phased out. So, by all means ask, but don't get your hopes up.
Naturally getting help with all visa paperwork and moving across here (legally/financially) is something that should be mandatory, otherwise you'll be in for something very difficult to mange on your own...hardly an incentive to move 1/3-way across the world.
I don't know if this will help...not used it myself...but I did run across UK Employment Contracts & Forms, a website that has buy-able contracts. may not help in your situation since it's geared toward the employer of a small business.
I also came across a checklist:
By law, employees are entitled to a written statement of their terms of employment and itemised pay statements; the written statement must contain the following:
- Employee's job title
- The start date of the employee
- Where the employee will work
- Details of salary and other benefits
- The employee's hours of work
- Entitlement to sick pay
- Holiday details
- Pension arrangements, if any
- Any notice provisions, and
- Any grievance procedures
In a small "scratching of the surface", I was able to come up with far more than I can list here. There's definitely a lot of info online about this. Have you tried searching Google?