If you are separated from your spouse but the divorce has not yet been finalised, you do not need to wait for the decree absolute before changing your name. A deed poll is completely independent of the divorce process: it does not reference your marital status, it does not require your spouse's consent, and it does not require any court proceedings to be complete. You can change your name at any point during or after a separation, using a deed poll.
The key point to understand is that a deed poll is a self-declaration: you state your current name and the name you intend to use going forward. The reasons for the change are not recorded on the document. You do not need to mention separation, divorce, or any personal circumstances. Once signed in front of two adult witnesses, the deed poll is immediately legally valid, and you can begin presenting it to organisations to update your records.
Many people in the process of separation choose to change their name sooner rather than later, particularly if using a married name is causing emotional distress, or if reverting to a previous name or choosing something new feels important as part of moving forward. There is no legal reason to delay, and waiting for the decree absolute can add many months to an already difficult period.
One important distinction: if you eventually want to use just the decree absolute route to revert to a pre-marriage name (without a deed poll), you will need to wait for the final divorce order. But if you are happy to use a deed poll (which gives you more flexibility in your choice of name), you can proceed immediately. The deed poll route and the decree absolute route are different options; a deed poll is faster and more flexible.
A deed poll from this site costs £14.99 and downloads instantly. Whether you want to revert to a maiden name, choose something new, or take any other name, the process is the same. You can start now.