Try this:
T1 = readtable('Edward Bam Eddata.txt');
T2 = table2timetable(T1, 'RowTimes','TimeStamp');
T3 = retime(T2, 'daily','linear'); % Desired Result
Avoiding the intermediate steps using readtimetable is also an option. I chose to do the intermediate steps so that I could see them, since I was unfamiliar with your file.
