From the CPS website - this may be useful for you:
Complainants proceeding with additional support/assistance
This section should be read to apply to complaints of intimate partner abuse and also familial abuse, unless otherwise stated.
Prosecutors should ask the police to consider exploring whether the complainant might change their position and be willing to proceed if special measures or other forms of support could be provided (for example, being screened from their abuser, giving evidence via remote video live link, or with a support representative being present whilst they give evidence). This will assist some way in helping the complainant not having to face the offender(s) in court.
Police and prosecutors should work closely to explore the special measures and support available and identify whether they would help the complainant to feel safe and confident when attending court.
Special measures should be explained to ensure complainants are fully informed of the options available if their reason for considering withdrawing support of retracting their allegation is due to a fear of giving evidence against their abuser(s).
A prosecutor with significant experience of domestic abuse issues should be consulted in any case where the complainant indicates a wish to withdraw support for the prosecution, before taking a final decision on how to proceed with the case.
Possibility of proceeding with a prosecution without the complainant's live evidence
The prosecution strategy should, from the outset, contemplate the possibility of proceeding without the complainant's support. Prosecutors should rarely need to apply to the court for further time to investigate this possibility. Prosecutors should always consider whether there is any risk to the safety of the complainant in the case proceeding without their support; a complainant should not be placed at increased risk through this course of action. Prosecutors should consider the following in the order outlined:
using evidence other than that of the complainant - prosecutors should assess as soon as possible whether there is other sufficient evidence (for example, admissions in interview, CCTV, 999 Tapes etc) to proceed. Where there is evidential sufficiency and a realistic prospect of conviction, prosecutors should consider whether a prosecution is required in the public interest in the usual manner (prosecutors should refer to the section on Preparing and Managing a Case, and the Joint Evidence Checklist for further guidance);
res gestae - statements made by the complainant or a witness to a third party, or around the time that the offence was allegedly committed, that are so directly linked to the events occurring at the same time, so as to make it unlikely that they were distorted or concocted may be admissible other than as hearsay;
making an application under section 116(2)(e) of the Criminal Justice Act 2003 - consideration should be given to applying to admit a complainant's statement as hearsay under section 116(e) of the Criminal Justice Act 2003, if there is evidence that the victim is in fear; or,
making an application under section 114(1)(d) of the Criminal Justice Act 2003 - where there is other evidence consideration should be given to applying to introduce hearsay if it would be in the interests of justice to do so (detailed guidance on this topic can be found in the legal guidance chapter on Hearsay). For example, any third party witness statements from neighbours, support representatives assisting the complainant etc.
Issuing of witness summons and compelling the complainant to give evidence
This is a last resort for complainants who disengage from a prosecution and should only be considered when the avenues above have been exhausted. Full consideration should be given to the specific facts of the case and impact on the complainant's safety and wellbeing. Further advice on the steps prosecutors should consider if taking this approach can be found in the text below and also in the summary table later in the document.
The police and any support organisations involved should be asked for their views on how they perceive the complainant will react if called to give evidence at a court hearing against their wishes, where a prosecution goes ahead without their support. The police should identify and verify whether further risk assessments are needed or have been recently carried out, as well as seeking the latest position regarding any civil and/or family proceedings that are, or may be concurrently taking place.
Discontinuing the case
It is possible that after considering a complainant's reasons for retracting their allegation or withdrawal of support, a prosecutor may discontinue the case as the complainant's input was the only evidence available, and a summons would not be appropriate. Prosecutors should ensure they have consulted with a senior prosecutor experienced in domestic abuse cases before the final decision to discontinue the case is made.