My washing machine keeps stopping and flashing up f05 its a hotpoint aquarius+ any help will be very greatfull

This is what information I could find for you and I hope this helps you out.......F05 is listed as no drain or pressure jammed on full.

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UPLUG THE APPLIANCE from the wall socket, pull it out and lower the drain hose into a wash basin to empty it. Repeat, get as much water out as you can. Next
check the filter on your machine (if fitted) for blockages. If no filter, you'll have to take the sump to pump hose off and remove the debris.

If no water, take the lid off, locate the pressure switch and disconnect the small bore plastic tubing from it, blow down the tubing to ensure it's clear. Try the machine again.
If this doesn't cure it you'll need either a new pressure switch or pcb and eeprom.