You don't galen. I have done it myself as although I am only 64 and healthy, my DC both live at a distance and it occurred to me that they would have a nightmare sorting out my affairs should I suffer a stroke, as happened to one of my friends. You can download all the forms you need, and the very helpful guidance notes, but you do need to complete them all very carefully indeed. If you have the time and patience to do it, you can save a great deal of money. Furthermore, if your income is under £9000 per annum, you can help with the cost.