As someone who has been a consultant for ten years, you should take into consideration the amount of travel you want to do. I've been lucky enough to work for some great firms with great clients, and I've seen a lot of the world, but it's cost me -- my marriage and my health.The amount of travel you need to do will be based upon a number of factors -- primarily your location and your company's client base. If you choose a smaller UK firm, or one that specialises in (for example) public sector work, you're unlikely to have to do too much long-haul travel. If, on the other hand, you join one of the big boys with an international client base, you will probably spend more of your time on the road.If you're flying to Asia or America on a regular basis, it's not practical to have you work 3 or 4 days on the client site. Typically you can bank on being away from home 3 weeks out of 4 or some similar sort of arrangement.The other variable is your home base. If you're based in central London, you might get away without having to travel too much -- much of UK industry is commutable from the centre. I've moved out of London, and while it's improved my quality of life, it's also increased the number of sites that are now not commutable on a daily basis.Different roles offer different amounts of travel. Ask your prospective company about how much travel their guys do, their home-life balance, opportunities for working from home, etc. It's not worth dismissing the whole consultancy thing out of hand, but it is worth going in with your eyes open.Good luck!