Get a priority remark, there is a good chance still of one mark being found because perhaps they miscounted or simply accidentally didn't give you a mark. Deadline for P. remark is 19th of Aug (tomorrow) since they aim to get it back to you before 31st of Aug, which is the last day Imperial can accept you. 100% get a remark because you never know and you don't want any regrets. It also won't go down unless you lose a lot of raw marks so don't worry. Check how close you are to the next boundary below you.