I have a medical background and aromatherapy experience so I could recommend a choice of 3 natural remedies to try, all of which have a natural antiseptic and soothing, cooling action . The best would be Lavendar gel (can find it at larger Boots branches in the natural remedy /homeopathic section - comes in a tube). Brill for mild rashes - put some on 2-3 x a day. Or Witchazel gel. Or Teatree lotion which, if you cant get hold of it ready mixed, buy a small bottle of UNperfumed face or body lotion + small bottle of Teatree oil and put 1 part oil in to 10 parts lotion and shake well to disperse the oil throughout(with the top on of course!). Teatree oil is also handy to keep in your toilet bag for dabbing neat onto any occasional spots - it's great, quickly clears them up. You just have to put up with the initial slight mild antisepticky smell but that's far nicer than TCP.
Hope that's of some help to you. Good wishes to you and everyone else.