Hello,
Welcome to ehealthforum and thanks for writing
Receding hair line from front and in a male is mainly genetic but sometimes hormonal imbalance like overproduction of dihydrotestosterone and thyroid hormones irregularities also play an important role.There are many medications to improve hair loss like finasteride, dutasteride and topically applied minoxidil but these are available only under prescription and are to be used after ruling out other causes of hair loss.
I would suggest you to visit a Trichologist and get clinical assessment and investigations done so that other causes can be ruled out.These are:
1)Iron studies and thyroid function tests
2)Testosterone and dihydrotestosterone levels
3)Trichoscopy (in this hair and scalp structures may be visualized at many-fold magnification)
4)Scalp biopsy
Give your diet an overhaul if you're lacking vital nutrients for growth and switch to foods for healthy hair like food rich in protein, vitamins(mainly vit A and vit C) and other micronutrient like zinc, iron and copper.Surgery is an option for hair transplantation but at such a young age personally I would not recommend you.Regarding the procedures in UK I am sorry I do not have any idea regarding that.
Rogaine what you have mentioned contains Minoxidil which I have explained previously.Kindly use it under Medical Supervision as it has associated side effects.
Take care!