advice for ex british army from commonwealth country

[highlanderz1]

Hi guys, really need your advice on this..

A mate of mine who is an ex british army soldier from Fiji wanted to know how to go about fixing his immigration status, if thats the right way of putting it..he thinks he is here illigeally and asked for help..i thought that being an ex army he should be alright but he said he may not..
He joined the army in april 2002 and left in nov 2005..he spent 3 years and 7 months in the army..from my understanding he should be applying for LTR (leave to remain), question is how does he do it? what impact does it have on him since he didnt do it straight after leaving the army? can he still somehow have a slim hope of getting his status fixed while being here? does he risk being deported?

would really appreciate your advice guys, im friends with him through my brother and cousin who served with him in iraq and afghan and he is a really top bloke who genuinely didnt understand the immigration side of things..he thinks that he might be send back home although he really wants to stay, and i personally think that he deserves to be allowed to stay..

[newperson]

Please do not multiply post!