That is a myth created by various radical Islamicists and promoted by the Red Tops in their quest for sensationalism at the expense of truth. The purpose of the veil, etc is for modesty. Muslims are required (according to Mohammed) to fit in with any non-Muslim society they choose to live in and respect their laws, etc. Whilst British Muslims are in the main trying to do this, an unrepresentative minority of Islamacists (as distinct from ordinary Muslims) are seeking to impose their (Salafist) concept of the Islamic lifestyle choice upon the host community - which is actually forbidden. Like conservative Evangelical Christians in the US and Britain, they are misinterpreting and deliberately mistranslating, in their case Qu'ranic Arabic texts, to suit their own narrow, fundimentalist agenda.
The juror in this case appears to be an Islamicist. Muslim jurors should have their heads uncovered. Those who refuse to comply in their non-Muslim host country are violating Koranic teaching and should be dealt with accordingly by their co-religionists! What is needed here is to have a Council of Jurisprudents, all born and trained as Imams here, to establish Fiqh* as it applies in this host country.