Raised toilet seats
Raised toilet seats are useful for the elderly as they make it easier to get on and off and also provide a degree of stability and may reduce the risk of a slip or fall. Have a word with your local Social Services department as they are often supplied free of charge. Otherwise they are sold in most disability shops and online.
Raised toilet seats are available in various styles depending on the space available and the persons preferences. Some simply fit onto the rim of the toilet bowl and are easily removed and portable if need be. They are also easily removed for cleaning.
Prices start at just over £11 for the simple versions and for the framed styles you will looking to pay upwards of £35. They are surprisingly comfortable too.