Prepayments, Accrued Income and Other Receivables (Tables)

12 Months Ended

Dec. 31, 2017

Prepayments Accrued Income And Other Receivables [Abstract]

Summary of Prepayments, Accrued Income and Other Receivables

	2017			2016
	(in thousands)
	£		£
Prepayments—manufacturing and clinical		1,979			3,050
Prepayments—other		522			173
Accrued income		67			21
VAT		473			198
Other receivables		9			192
		3,050			3,634