you can get married under provisions of special marriage act as both are British citizens 

2)30 days notice of intended marriage signed by parties has to be submitted

3) 

The following documents are required for both the partners:

a valid Passport

original Birth Certificate showing parents' names

documentary evidence regarding stay in India of the parties for more than 30 days (ration card or report from the concerned SHO)

no objection certificate issued by British embassy or consulate

If you are getting married in church you only need the photo id and address proof. If any additional document demanded by church for their requirement

- Since, you both are Indian origin , then you can get registered your marriage in your city of residence under the provision of Special Marriage Act. 

- Further the following documents required for marriage registration 

1. Birth certificates (for age proof)
2. A valid visa of more than 30 days for both the parties 
3. A single-status affidavit signed by both parties. In case one of the parties has married previously, the Divorce Decree (for divorcees) or Certificate of Death (for widowed) is necessary.
4. Address proof and passport size photographs
5. Adequate documentary evidence of 30-day residence in India
6. A ‘no-objection’ letter from the US Embassy or Consulate, 
7. Three witnesses are required, who have to provide passport sized photographs, as well as identification and proof of address

- 30 days residency requirement means that either the bride or the groom has to be living in India for at least 30 days prior to applying to the local registry office to get married.

- If no objections to the marriage are received within 30 days of the application, a civil ceremony at the registry office will take place, however you can also marry in the Church in the presence of your all the relatives after informing the office of the registrar. 

- The marriage certificate is usually issued a couple of weeks after the wedding

Solemnization of marriage in Church. Following is procedure under The Indian Christian Marriage Act, 1872 for performance of marriage in a Church…

1. One of the parties to intended marriage should give a notice in writing of intended marriage in Form prescribed to Minister of Church or the Priest.
2. The notice will be affixed to the  notice board of Church where the  marriage is intended to be performed. If the  marriage is intended to be performed in private house, such notice  shall be sent by Minister of Church or the Priest to the  Marriage Registrar of the District.
3. The Minister of Church or the Priest will issue a certificate  of notice after four days of receiving such notice subsequent to a declaration in a fixed format is made by one of the  
4. Marriage will be performed withing two months of issuing certificate of notice by the  person mentioned in the  certificate  of notice in the  presence of two witness.
5. Person performing such marriage shall enter the same in the  Register kept for the  
6. A certificate of marriage shall be sent to the  District Registrar of Marriages within one month of solemnization of marriage.

Following is procedure under The Indian Christian Marriage Act, 1872 for performance of marriage in before Registrar of Marriages…

1. An application in the prescribed form should be made to Registrar Marriages in the  district in which  the  parties have resided for more than thirty days.
2. If the parties reside in different district, each party should make such application to respective Registrars of districts containing details of names, surnames, place of intended marriage, address of parties. The  Registrar shall cause the  notice to be affixed on the  notice board of his office and issue a certificate  of notice to the  person  submitting application subsequent to administering the  prescribed oath.

After issuing of such certificate  of notice, marriage will be performed before Registrar according to ceremony desired by parties within two months period and copy of certificate  will be issued to the  person applying on payment of prescribed fee.

Dear Client,

Every NRI who marries a citizen of India or another NRI must get his marriage registered within 30 days. If the marriage occurs outside India, it must be registered with a Marriage Officer, who will be appointed from among the diplomatic officers in a foreign country.

Court marriages in India have given an opportunity for individuals to solemnize their marriage procedure, regardless of their nationality. The Special Marriage Act governs the court marriage process and documents required to partake in the marriage.

They have to get married under the provisions of special marriage act only and not permitted to marry under personal marital laws

One of the two individuals can reside in the district of their choice for thirty days, and then send the notice to the district's Marriage Officer. Both of the individuals can reside in the district of their choice for thirty days, and then send the notice to the district's Marriage Officer.

Before solemnizing your marriage, you should ensure that the following documents are ready:

1. Birth certificates (for age proof)
2. A valid visa of more than thirty days for the foreign national
3. A single-status affidavit signed by both parties. In case one of the parties has married previously, the Divorce Decree (for divorcees) or Certificate of Death (for widowed) is necessary.
4. Address proof and passport size photographs
5. Adequate documentary evidence of 30-day residence in India
6. A ‘no-objection’ letter – For instance, if an American citizen wishes to wed in a civil marriage ceremony he may be required to present to the marriage officer a ‘no objection letter’ from the US Embassy or Consulate, as well as proof of termination of any previous marriage if any. Similarly, a citizen of any other foreign country is required to present the no objection letter from the Embassy or Consulate of his/her country. The parties also have to wait at least 30 days from the date of initial application to formalize the marriage so that the marriage officer can publish a notice, which might even include a newspaper publication for giving an opportunity for any objections to the marriage to be voiced.