​

Note 8 — Operating leases

The following table shows the lease costs for the years ended December 31, 2021 and 2020 (in thousands):

​

The maturities of operating lease liabilities as of December 31, 2021 are as follows (in thousands):

​

The Company has operating leases in relation to property for office and research facilities. The maximum lease term without activation of termination options is to 2041.

On August 13, 2021, the Company modified the lease of 60 Jubilee Avenue, Milton Park, Abingdon, Oxfordshire, UK (the “60 Jubilee Avenue lease”) and on August 20, 2021, the Company modified the lease of 39 Innovation Drive, Milton Park, Abingdon, Oxfordshire, UK (the “39 Innovation Drive lease”). The effect of the modifications extended the first break option exercisable by the Company and has resulted in a change in the lease term for both leases.  The modification to the 39 Innovation Drive lease also amended the lease payments for that lease. The modifications did not result in the identification of a separate contract.

Upon modification, the lease liability has been remeasured using the current estimate of the Company’s incremental borrowing rate and the amount of the remeasurement of the lease liability has been recognized as an adjustment to the corresponding right-of-use asset. The effect of the modification was to increase the lease liability and the corresponding right-of-use asset by $4,290,000.

The modification also removed a bank guarantee, which resulted in a reduction in restricted cash of $2,739,000. The Company paid $1,736,000 to the lessor as a rent deposit.

​