Here is a letter template recommended by the ICO. They state it is helpful to keep the SAR limited to specific dates because if it is deemed to be a vexatious request or one that could be deemed ' manifestly unfounded or excessive ’ they may decline the request citing that reason. Hence my point upthread to be clear why you want it. You have the right, but you also have responsibilities.
Letter template
[Your full address]
[Phone number]
[The date]
[Name and address of the organisation]
Dear Sir or Madam
Subject access request
[Your full name and address and any other details to help identify you and the data you want.]
Please supply the data about me that I am entitled to under data protection law relating to: [give specific details of the data you want, for example:
my personnel file
emails between ‘person A’ and ‘person B’ (from 1 June 2017 to 1 Sept 2017)
my medical records (between 2014 and 2017) held by ‘Dr C’ at ‘hospital D’
CCTV camera situated at (‘location E’) on 23 May 2017 between 11am and 5pm
copies of statements (between 2013 and 2017) held in account number xxxxx.]
If you need any more data from me, or a fee, please let me know as soon as possible. It may be helpful for you to know that data protection law requires you to respond to a request for data within one calendar month.
If you do not normally deal with these requests, please pass this letter to your DataProtection Officer, or relevant staff member. If you need advice on dealing with this request, the Information Commissioner’s Office can assist you. Its website is ico.org.uk or it can be contacted on 0303 123 1113.
Yours faithfully
[Signature]