Honouring a commitment to EU nationals would send a message, said the signatories of Sunday's letter.
The DH said it would honour a commitment first made by Lamb to introduce a maximum waiting time for people with an eating disorder.
The Republican congressman who assaulted a Guardian reporter has failed to honour a commitment made in court to grant the reporter a one-on-one interview.
Dick Oliver, who was appointed chairman in 2004, said BAE had failed to honour a commitment made to the US government in 2000 to establish and comply with US regulatory requirements within a certain period.
Mancunians are used to making the best of rainy days and here, honouring a commitment after a cancelled gig in February for a short tour culminating with the Splendour in the Grass festival, Johnny Marr sparkles.
The plans depend on the government honouring a commitment to increase spending on equipment by 1% from 2015, and on existing programmes coming in on time and on budget.
Len McCluskey, the assistant general secretary of Unite and the main union negotiator in talks, said he had yet to secure an agreement with the airline and was therefore honouring a commitment to hold a new ballot after a 12-day Christmas walkout was ruled unlawful by the high court.
A group of non-governmental organisations, including Oxfam, Cafod, Action Aid and DATA, have taken a full-page advertisement in today's Guardian, calling on the chancellor and the prime minister to honour a commitment to increase aid to 0.7% of national income.
It has been a song from the same hymn sheet in Canberra with the likes of James Tedesco, Michael Ennis, Kevin Proctor and Josh Mansour rejecting big money offers while Anthony Milford shunned a deal that would have made him one of the richest players in the NRL to honour a commitment to Brisbane.
Cameron insists he fully intends to honour a commitment to increase NHS spending by £10bn by 2020 but adds: "If we leave, independent and respected experts like the IFS and National Institute for Economic and Social Research say that by 2020 we will face a black hole in our public finances of up to £40bn.
