Revenue from contracts with customers - Assets and liabilities related to contracts with customers (Details) - GBP (£) £ in Thousands	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Revenue from contracts with customers
Contract liabilities - deferred revenue at beginning of year	£ (190,333)	£ (223,500)
Recognized in revenue during the year	135,560	183,186
Cash received/amounts invoiced during the year	(86,153)	(150,019)
Contract liabilities - deferred revenue at end of year	(140,926)	(190,333)
Current contract assets and contract liabilities
Revenue from contracts with customers
Contract assets - accrued revenue at beginning of year	45,966	39,532
Recognized in revenue during the year	39,037	44,383
Cash received/amounts invoiced during the year	(43,973)	(37,949)
Loss allowance	(486)
Contract assets - accrued revenue at end of year	40,544	45,966
Contract liabilities - deferred revenue at beginning of year	(171,574)	(190,146)
Recognized in revenue during the year	135,560	183,186
Cash received/amounts invoiced during the year	(86,153)	(150,019)
Reclassified during the year	4,183	(14,595)
Contract liabilities - deferred revenue at end of year	(117,984)	(171,574)
Non-current contract assets and contract liabilities
Revenue from contracts with customers
Contract liabilities - deferred revenue at beginning of year	(18,759)	(33,354)
Reclassified during the year	(4,183)	14,595
Contract liabilities - deferred revenue at end of year	£ (22,942)	£ (18,759)

The amount of an entity’s right to consideration in exchange for goods or services that the entity has transferred to a customer, when that right is conditioned on something other than the passage of time (for example, the entity’s future performance).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2020-01-01
-Paragraph 105
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_105&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2020-01-01
-Paragraph 116
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- Definition

The amount of an entity’s obligation to transfer goods or services to a customer for which the entity has received consideration (or the amount is due) from the customer.

+ References

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- Definition

The decrease in contract assets resulting from impairment. [Refer: Contract assets; Impairment loss]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 15
-IssueDate 2020-01-01
-Paragraph 118
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- Definition

The decrease in contract liabilities resulting from the performance obligation being satisfied. [Refer: Contract liabilities; Performance obligations [member]]

+ References

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-Name IFRS
-Number 15
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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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No definition available.

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- Definition

Decrease through cash received or amounts invoiced, contract assets

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Increase (decrease) in contract liability through reclassification between current and non-current

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No definition available.

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Increase through cash received or amounts invoiced, contract liability

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- Definition

Increase in contract assets through revenue recognized

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No definition available.

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