Several Derry pubs told that they cannot reopen on Friday Strict guidelines over what constitutes an 'outside' space The owners of the Magnet bar have been told that it cannot reopen on Friday. Reporter: '); Several pubs in Derry have been told that they cannot reopen on Friday. The bars had been planning to open for outdoor eating and drinking as part of the latest easing of Covid-19 restrictions. However, they have now been told that they cannot reopen due to guidelines what constitutes an outdoor space. The Department of Health said the "general rule of thumb is that outdoor premises should not be more than 50% enclosed".