Don't think it'll damage the car but it apparently can cause problems with warranty. If you haven't been servicing your car at the right times, it can invalidate things. Or so I heard last time I asked this.
I think you have 1000 miles grace so if you're gonna do more than that by the time you get round to servicing, it's better to do it sooner. Also, if you're gonna do a long trip, it'll be better for the car to get serviced before anyway.