I am planning on having my Angle barbarian PCs interrogated by the city council of London on matters of law and custom. I wonder if the members of the forum could give me some ideas for questions that the council could ask the PCs about medieval/dark ages law and proper customs, particularly if they relate to situations that differ significantly from modern law or custom. It would be particularly good if they could be phrased as a situation that requires a judgement.

Thanks.

Do you want high law or low law? Nobles or peasants? Depending on how high ranked your PCs are you should focus on one or the other. A vassal knight with some manors would never get to judge over anything but peasants and burghers. While a banneret knight might get to rule over other lower knights etc.
Then it differs greatly if you are pre or post arthur, since one of his major things is that he changes and upholds the laws. So in which era are you?

Some ideas that spring to mind:

Inheritance
Most bitter verdicts come from the resolution of inheritance. This would especially be nice since the saxon laws differ from the briton laws.

Loyalty
A vassal knight has two manors each for a different lord. These lords both muster to fight each other.
Serfs would be another matter. If someone wants to buy the debt of an indebted serf, is the serf now loayel to the purchaser or the owner.

Maybe you can get some ideas from this http://en.wikipedia.org/wiki/List_of_Roman_laws

Do you want high law or low law? Nobles or peasants? Depending on how high ranked your PCs are you should focus on one or the other. A vassal knight with some manors would never get to judge over anything but peasants and burghers. While a banneret knight might get to rule over other lower knights etc.
Then it differs greatly if you are pre or post arthur, since one of his major things is that he changes and upholds the laws. So in which era are you?

We're pre-Arthur.

Really what I had in mind was the London city council trying to work out whether the Angles would be good neighbours and will the Angles disrupt life for the city.

Thanks for your suggestions and the link to Roman laws.

Then I would say that if you play more saga and fantasy than real history like, you might want to have your players use scandinavian laws with Thing and Allthingi, something which is profoundly different than the roman codes used by the britons.
It also works great if the saxons in your world is wotanic and not simply pagan. That way the saga works even better.
It works sort of for historical purposes as well since both scandinavian law and saxon original law comes from teutonic or germanic law tradition.
However note that in the real world the anglo-saxons where mostly christians with roman law so...

What could also be fun from a player perspective would be the more democratic approach of the scandinavian thing than the authoritan laws of the britons. Especially before Arthur since it is basicly "might makes right".

Also note that a lot of the roman laws make it a punishable offence not to be christian.. ;D

Some links of note and use:
http://en.wikipedia.org/wiki/Medieval_Scandinavian_laws
http://en.wikipedia.org/wiki/Codex_Runicus
http://en.wikipedia.org/wiki/Leges_barbarorum
http://en.wikipedia.org/wiki/Visigothic_Code