Hi again!! Just found this on Ryanair web page surely this would apply to your flights too.
Cancellation Notice: For All Flights To/From The UK Between Dec 20th/Jan 3rd23 Dec 2020 • 16:32
Ryanair is processing cancellations for all flights to/from the UK between Dec 20th/Jan 3rd that have been banned by EU Govts regulation. All affected customers will receive an email not...
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...ification and they will be offered practical alternatives including a free move or refund if they so wish.
A small number of flights will operate to/from the UK from Dec 23rd to Jan 3rd primarily to facilitate UK passengers stranded abroad and to support passengers who need to travel for essential reasons. For passengers (booked on these operating flights) who do not wish to travel prior to Jan 3rd, Ryanair will facilitate a flight change, where no change fee will apply (any difference in fare will be charged), to any new date up to March 15th 2021. Any passenger whose flight has been cancelled can also move to these operating flights, subject to availability.
As I said I found it easier to speak to Customer Services as they make the change there and then with no charges except for increase in flights for new dates, if any- Have you tried to change them to a date before 15 March? I have Lost so much money to Ryanair for flights this year hate to give them anymore. Maybe try again quoting above. I hope you have success as a lot to lose and a lot to pay out too!!!! for a service you have already paid for Gillian