Section 7 of the MRC's data management plan template includes spaces for links to a number of policies.
Screenshot of MRC DMP template
These may be policies which apply at institutional, departmental, or study level. A few suggestions for institutional policies are given below, but you will also need to check whether there are local policies which it would be appropriate to include.
Bear in mind that the purpose of this section of the form is to demonstrate that you are familiar with the policies which apply to your research. To give your application the best chance of success, it's therefore important to ensure you have read the policies and selected those which are most relevant (for example, a policy which deals exclusively with handling personal data will be less relevant if your project does not involve any data of this sort). It may also be helpful to state the steps you will take to comply with the policies elsewhere in the DMP.
Data Management Policy & Procedures
You could also include a link to the Research Data Oxford website. Most of the site content is guidance rather than policy, but this indicates that you're aware of the advice provided by your institution.
Data Security Policy
Data Sharing Policy
Oxford doesn't have a separate institution-wide policy on data sharing, but the main data management policy encourages data sharing where possible and appropriate.
As noted above, you could also include a link to the Research Data Oxford website, or to a specific section of it, such as the one on Sharing data.
Institutional Information Policy
Oxford does not have an institution-wide information policy (as distinct from the information security and data protection policies linked to above). However, there is a divisional policy which is likely to be relevant to projects applying to the MRC for funding: