I cant find this on line and may be store specific?, but found in my local ASDA (derby spondon) they have pro plus at 10p a pack
these are anywhere from £1.93 to £3.69 so 10p is a bargain if you use them that is lol
there £2.82 on the ASDA website
Relieves Tiredness, Fast Acting - Feel More Awake! 48 tablets per pack.
Caffeine for the relief of temporary tiredness. Caffeine is a stimulant which can help to maintain mental alertness and make you feel less tired.
Each tablet contains the active ingredient: 50mg Caffeine Anhydrous Ph. Eur. - also contains Sorbitol and Magnesium Stearate.
Directions: always read the detailed directions on the pack. Adults: 1-2 tablets with water if preferred, as required during the day. Do not exceed 2 tablets in any one hour, or 12 tablets in 24 hours. If tiredness persists, consult your doctor.