| Group [member] | Company [member] | ||
| Trade and other current payables [abstract] | |||
| Current trade payables [abstract] | |||
| Trade payables | |||
| Trade payables due to related parties | |||
| Other current trade payables | |||
| Total current trade payables | |||
| Current other payables [abstract] | |||
| Current other payables due to related parties [abstract] | |||
| Other payables due to from trustees | |||
| Total current payables due to related parties | |||
| Current non-trade payables [abstract] | |||
| Deferred income | |||
| Accruals | |||
| Retention payables | |||
| Deposits and advanced billings | |||
| Dividend payables | |||
| Other current non-trade payables | |||
| Total current non-trade payables | |||
| Total other current payables | |||
| Total trade and other current payables | |||