Question 22 of the I-130 form asks you to request a consulate or say whether you want to pursue adjustment of status. You or your spouse would have answered that question when filling out the I-130. If you indicated the London consulate for that question, they will automatically transfer the case to the London consulate. You need to look at a copy of the I-130 your husband filed, if you don't remember what he or you wrote for that question.
You need to be in the US when the I-485 is filed; you are outside the US, so you cannot file it now. And they will most likely refuse you entry to the US if they realize you have an approved I-130 and are married to a US citizen. And even if they let you in, there is a pending court case that could result in a ban of filing I-485 after entering with the visa waiver.
So all factors considered, getting back into the US to pursue the I-485 route is not a very viable option for you. You need to complete the GC process via the consulate, which involves different forms such as the DS-230, not the I-485 or I-765. In order to get the case transferred to the consulate, the I-824 needs to be filed, unless the consulate was already requested on the I-130.