Ashley Kosciolek, senior cruise writer for The Points Guy, always packs a gown or a fancy cocktail dress for a formal night. "I work from home and don't have a reason to dress up otherwise ...

An Opinium survey showed that 22% of UK parents feel the need to impress with the fancy dress on the day. Parents also spend more, with the average being around £20, but some even spend upwards of £50 ...