Evyn Eyespy

Regarding the news 'You will soon be able to use your Personal Tax account to check if you can make voluntary National Insurance contributions. You will also be able to approve a payment through your online bank account using the online service', anyone able to tell me when this will be available? I wish to make voluntary NI contributions but have not been able to get through to get the reference number. Time is running out. I've been trying for months and months and months.