Normans vs Anglo-Danes/Vikings

Hello!
Our community planning a few armies on Dark Ages.
Have anybody experience how normans play against armies with shieldwall?
In current redaction shielwall do not need test and compulsory in any frontal attack. So there is no sence shoot them and draw out from position, like Hastings, they will be in shieldwall in any situation.
So how cavalry normans can beat them? Only flanking?

I played once against a shieldwall and it was really hard. I think it is vital to denie one flank to the opponent and concentrate on the other flank in order to break parts of the flank. If a shieldwall attacks on the whole front, it is hard to break them. If you are willing to attack in two waves it is hard for the shieldwall troops to prevail since they have an average VBU.