RFL5.3 How long are applicants automatically refused for?
If an applicant falls to be refused under 320(7B), applications must be refused for the following periods:
1 year if they left the UK voluntarily, whether or not at public expense;
5 years if they left UK voluntarily, at public expense;
10 years if they were removed or deported from the UK;
10 years if they practised deception (which includes using false documentation) in support of a previous visa application.
Where an applicant has overstayed, breached a condition of leave, was an illegal entrant or used deception in a leave to remain application, the automatic refusal period is dated from the date the applicant left the UK. Where an applicant has used deception in a visa application, the automatic refusal period is dated from the date (in which deception was used) was refused.
But passengers who have been refused at a port of entry, and have complied with the terms and conditions placed upon them by the refusing port, are only subject to a one year refusal period.
Where more than one breach of the UK’s immigration laws has occurred, only the breach which leads to the longest automatic refusal period from the UK will be taken into account.
For example, an applicant left the UK voluntarily at her own expense in January 2008 and applied for entry clearance using false documents in February 2008. Any subsequent entry clearance application must be automatically refused for 10 years, until February 2018. This is the longer refusal period where deception has been used in an entry clearance application. The shorter refusal period of 1 year for leaving the UK voluntarily is not applicable.
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RFL5.4 When does rule 320 (7B) not apply? Rule 320 (7C)
Under paragraph 320(7C) of the immigration rules, you must not refuse an applicant under 320(7B) if they are applying in the following categories:
Spouse, civil partner, unmarried or same-sex partner (Paragraphs 281 or 295A);
Fiancé(e), or proposed civil partner (Paragraph 290);
Parent, grandparent or other dependant relative (Paragraph 317);
Spouse, civil partner, or unmarried or same-sex partner of a refugee or person with humanitarian protection (Paragraphs 352A, AA, FA. FD);
Those applying to exercise rights of access to a child (Paragraph 246);
They were under the age of 18 at the time of the most recent breach of the UK’s immigration laws.
As concessions outside the Rules, you should also not refuse an applicant under 320(7B) if:
the applicant has been accepted by UKBA as a victim of trafficking (see RFL 5.7)
the applicant was in the UK illegally on or after 17 March 2008 and left the UK voluntarily before 1 October 2008 (see RFL 5.6)
In addition you must not refuse an applicant under 320(7B) if:
false documents or false representations were used in a previous visa or leave to enter or remain application, and the applicant was not aware that the documents or representations were false;
the period specified for automatically refusing applications has expired; or
following their breach of UK immigration laws, UKBA issued a visa or leave to enter or remain in the knowledge of that breach e.g. a student who has overstayed but was granted LTE following an out of time application.
http://www.ukvisas.gov.uk/en/ecg/refusa ... r#21404375
Get marriage 
as simple is that. 
( if present immigration rules stay same )