Upvote:8
This seems reasonably straightforward to fix, provided that you can supply the evidence requested.
- your personal circumstances change significantly between now and your next application
Your mother has now passed; this is a significant change in circumstances because the reason for your trip no longer includes the provision of care to your mother. If you can supply a copy of your mother's death certificate that would probably be helpful in supporting the new reason for your trip.
- you provide compelling new evidence with your next application
As the refusal letter states, you would need to supply at least the following new evidence:
If you can also supply further evidence of you having seen your mother in the last 15 years (for example, relevant passport stamps or evidence of past travel arrangements), that would probably be helpful in supporting your application.