Markaz Ul-Islami has made the following calendar click here. It is based on seeing the sunrise come in and not observations like others. I would encourage all those present in Bradford to use it.
Also in May 28th scholars in Birmingham came to an agreement that the sunrise comes in 1 hour and forty minutes before sunrise. So I would advise all brothers and sister to use calenders that are using the later time. The later time based on astronomical timetables and not observation of the eye.