Gold open access charges are eligible costs to Horizon 2020 grants. You will need to indicate expected costs in your grant proposal - contact Brunel's Open Access Team for help estimating them. There is a pilot to pay open access charges after grants have closed.
Before submission, check that your publisher's embargo on open access in a repository is no longer than 6 months (12 for Social Sciences and Humanities), or that there is a Gold open access option.
More details can be found on the EC website.
If you are Horizon funded and are requesting payment for Gold OA by Brunel's institutional fund, you should first investigate this funding option. This is in order maintain a sustainable transition to open access publishing for the institution. If there is a reason you cannot access Horizon funding, and you still wish (or must) comply through Gold OA, please provide full details along with your request in BRAD.