Brit Spelling question

[Sister Mary Lunatic]

No: HPFGUIDX 12485

In comparing the UK version of Philosopher's Stone to the US version
(Sorcerer's Stone), I found that while the US version uses the word
"practice" throughout the book, the UK version uses two spellings of the
word : "practise / practice" -- specific example being in UK-PS page 28
(practise) and then UK-PS page 79 (practice).  Is there a different
definition that corresponds to the different spellings, or is it just
acceptable to use both in the UK?

SML

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"All suffering comes from a person's
inability to sit still and be alone."
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