Questions about soft drinks containing ethyl alcohol have been raised a number of times by concerned Muslims over the past few years. In these cases the Muslim Law (Shariah) Council in the UK have confirmed that the composition and procedure involved in the production of these soft drinks is in compliance with the rules of Shariah and therefore Halal for Muslims to consume.Source
If you were to analyse soft drinks you would find a tiny trace amount of ethyl alcohol in many of the finished products. The reason this is common in soft drinks is because the flavouring process often results in a trace of ethyl alcohol. This amount is typically less than 0.05% - a level that is so low that the body metabolises the ethyl alcohol faster than it is consumed meaning it can have no intoxicating effect. Some Rubicon products do contain trace levels below this 0.05% level.
AG Barr the soft drinks company who have made Rubicon products for the past 25 years have accreditation from the Muslim Law (Shariah) Council UK that testifies that its drinks are in compliance with the rules of Shariah and therefore are Halal for Muslims to consume.
Rubicon only makes soft drinks and these have been enjoyed by the people of Britain and around the world for over 25 years.
We hope this answers your questions and allays your concerns about the suitability of Rubicon to be consumed by Muslims. If you have any further concerns, please do not hesitate to contact us on firstname.lastname@example.org.
The above quoted words are taken directly from Rubicons Faq on it official website.. now it does have "trace" amount of alcohol in it... Halal or not?? you need to question an Alim who is well versed with the Fiqh of food items and is a pious (muttaqi) person.
as an aside you can also look for updates on the GMWA website... here