Logo Application NHS

For now,  I have designed t-shirts and mugs as the business cards can be designed tomorrow when we are together, purely because there is a strict guideline for business cards, and basically our only artistic license (the logo) is 4.25mm high.
We would have liked to have designed proposals for the signs but were very unsure about how it would work, again the NHS have very strict guidelines, but we didn't know if St Martins is classed as solely NHS. This is just how it would look on white t-shirts, I don't think coloured material would be appropriate as the colours might clash. White adds to the clinical and purity of the design.