Is it okay to give the visa application to the information prepared by the British visa immigration representative?

No, the visa application has been handed over to the British visa immigration office and still needs to be heard. Simply handing it over to the British Visa and Immigration Bureau bi does not mean that the prepared materials are enough, and the results can only be obtained after the trial. When you apply for a visa, you must fill in the information carefully to avoid being refused a visa and affecting the progress of going abroad.