Extract from the email received:
We hope that these revised flight details will be acceptable to you and if this is the case, there is no need to contact us further. If the new arrangements are not suitable for your requirements, subject to availability and paying any difference in price, we will search for alternatives and amend your flight.
There were then 2 click buttons 1 to accept and 1 for a refund. I have spoken to them this morning and the email I received is incorrect and now have to wait for a new one with the correct return times!!!