URC-7541 as shipped seems to support both 0283 and 0863.
URC-7562 as shipped seems to support only 0863 as far as I can tell.
Neither of those models as shipped support 1176 or 3140 as far as I can tell.
NOTE: 0863 has many key positions jumbled on those two models and would need most keys re-assigning, or a more permanent memory update applied.
@Edd23 do you mean URC-7940?
If so you need to assign the function to one of the keys on the remote. When you look at the original BT Youview you will see that subtitle & delete share the same button.
You just need to do this, assuming SAT is used for the BT box. If VCR is being used then replace SAT with VCR below
1 Press the SAT device key.
2 Press and hold down the M (MAGIC) key until the red LED underneath the POWER key blinks twice (the red LED will blink once then twice).
3 Press 9 9 4. The red LED underneath the POWER key will blink twice.
4 Press the M (MAGIC) key once.
5 Enter the 5-digit function code (00166).
6 Press the key to which the function will be assigned, for example -/--.
7 The SAT device key will blink twice.
An online copy of the URC-7940 manual can be found here
If your one for all remote is another model the sequence of keys could be different.