As there is a definite end date to the lease at the point of substantial performance, the notional lease is for a fixed term of 10 years and 1 month (from and including 1 March 2020 to 31 March 2030).
Gan fod dyddiad dod i ben pendant i'r les ar y pwynt cyflawni’n sylweddol, mae'r les dybiannol am gyfnod penodol o 10 mlynedd ac 1 mis (o a chan gynnwys 1 Mawrth 2020 hyd 31 Mawrth 2030).