@tinkerbell.
As a student nurse within the NHS, I would imagine that you would support the notion that any treatment offered to patients by the NHS should be clinically proven, and have credible, controlled evidence supporting it?
Since the budget for the NHS is derived from the public purse, which is limited, and there are many, many competing alternatives for the money, you would surely agree that it is unethical to offer clinical therapies unsupported by compelling, credible evidence?
The reason why anecdotal and observational evidence should be treated with scepticism is because such evidence is unreliable, relying on peoples memories and experiences, and usually lacking any sort of control for confounding factors.
The most recent, significant review of randomised, controlled trials of reiki came to the conclusion that " The evidence is insufficient to suggest that reiki is an effective treatment for any condition." (Lee, MS Ernst, E, NHS Evidence - Complimentary and Alternative Medicines - Reiki)
Stick to the proven relaxational benefits of a good massage would be my advice / opinion.