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IPO Related Expenses - Summary of Initial Public Offering Related Expenses (Details) £ in Thousands	12 Months Ended
	Dec. 31, 2017 GBP (£)
Disclosure Of Initial Public Offering Related Expenses [Abstract]
IPO related expenses	£ 1,794

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- Definition

Initial public offering related expenses.

+ References

No definition available.

+ Details

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X

- Definition

Initial public offering related expenses.

+ References

No definition available.

+ Details

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