Excellent thread. I agree with the majority of the suggestions you've made. I will try not to duplicate what you have suggested. Here are some of my thoughts for the future.
1. Regular weekly English Katha on sunday's at all UK gurdwaras.
2.Every gurdwara should have a feedback mechanism where sangat can provide feedback on current services, services which they would like the gurdwara to provide and ideas for improvement.
3. Support groups for- single parents/widows/divorcees. alcoholics/drug users.
4. Improved use of media- facebook, youtube, email, text message, gurdwara website,
5. education- weekly sikh classes, gatka, kirtan, santhiya, free sikh education books to families to learn about sikhi and for parents to teach their kids the basics.
6. Panj kakkars and gutkas should be freely available to sangat
7. cresh/child care facilities
8. support wider non sikh community- homeless
9. gurdwaras should start purchasing farmland to produce their own food requirements, milk, surplus can be sold for income
10. Each city should create a local council of gurdwaras where represantitives meet regularly to discuss local issues, and work together to promote sikhi. perhaps sikh council could organise this.
11.promote healthy lifestyles- Healthy langar, less butter in dhaal/sabji. gym.
12. university scholarships for intellectual gursikhs whom cant afford to go to university to study top degrees
13.Teach all gyanis English, CRB checks on them, purchase accommodation locally for them, Should receive at least minimum wage. Incentive to learn English- bonus/pay rise? Also need to raise caliber and qaulity
14. more bibiya and youth in committees
15.weekly/monthly "challenges" for sangat eg amritvela for 1 month, stop alcohol for 1 month etc. if they know others are doing this they can help each other to persist with it