I think it is effectively just a positioning flight inbound as you suggest and the reason there is no inbound OTP-SEN sector is probably explained by this being a LHR displacement due to their pax number restrictions and the re-routing from SEN allows their normal LHR flights to operate normally. This SEN-OTP is perhaps additional to the normal LHR capacity.
Last edited by Expressflight; 4th Aug 2022 at 15:48.