Seedcamp have produced standard docs including termsheets for the UK: http://seedsummit.org/ http://seedsummit.org/ IANAL so can't definitively answer your que

Seedcamp have produced standard docs including termsheets for the UK: http://seedsummit.org/ http://seedsummit.org/ IANAL so can't definitively answer your question, however I believe you'd need UK legal docs.