:salam:
Like all of the subjects you will need to plan the structure well for it to be most effective. There is Da’wah in general, the techniques in general, an understanding of the modern person in the UK and then the context to what can be used to appeal to them.
A suggested structure would be:
The call to Islam - criteria of truthfulness and trustworthiness to support the claim to prophethood
The model ambassador: Hz. Musab ibn Umayr
http://books.google.co.uk/books?id=jV9SlVbz94wC&pg=PA33&lpg=PA33&dq=hazrat+musab+ibn+umair&source=bl&ots=u7pIKQfuA5&sig=DPx-lUfQa8PWFr7lOKQh4pV9_wI&hl=en&ei=Qy87TOeeJtOQOIvYsYoK&sa=X&oi=book_result&ct=result&resnum=1&ved=0CAUQ6AEwADgK#
Lessons from his life
Message of no compulsion in Qur’an
Science and objectivity - the new religion
The demise of Critical Thinking and ability to engage in rhetoric and discussion
Dominant media and how to combat it
Behaviour is better than words
Learning from Jehovah’s Witnesses - as the model not to adopt
The Dai’ is an ambassador - the ambassador is a philanthropist
Typical questions and knowing their typical responses
Conclusion:
True da’wah is rooted