WATCH: ITV Anglia's Political Correspondent Emma Hutchinson rounds up the day's politics from Luton.
The leader of the Liberal Democrats said her party's economic policies are "robust" and "costed" in a visit to the St Albans constituency.
Jo Swinson criticised Labour and the Conservative's plans as "shopping lists", on the day all the leaders of all three parties gave speeches to the Confederation of British Industry (CBI).
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Before her speech, Ms Swinson visited St Albans, which is her party's foremost target in the Anglia region.
It is currently held by the Conservatives, but a majority of 6,109 means the Lib Dems would need a swing of just 5.4% to take the seat.
During her visit, Ms Swinson looked round Imagination Technologies - a technology company based in King's Langley.
St Albans constituency candidates:
- Anne Main, Conservative
- Daisy Cooper, Liberal Democrat
- Simon Grover, Green
- Rebecca Lury, Labour
- Jules Sherrington
Jo Swinson, Liberal Democrat leader
Labour in Luton
Elsewhere on Monday, Labour's Shadow Police Minister Louise Haigh visited Luton.
She was there to support local candidates and hold a round-table discussion on crime and policing.
Luton North candidates:
- Jeet Bains - Conservative
- Simon Hall - Green Party
- Linda Jack - Liberal Democrats
- Serena Laidley - Women's Equality Party
- Sarah Owen - Labour
- Sudhir Sharma - Brexit Party
- Muhammad Yasin Rehman - Independent
Luton South candidates:
- Parvez Akhtar - Conservative
- Mohammed Ashraf - Independent
- Ben Foley - Green Party
- John French - Best4Luton
- Rachel Hopkins - Labour
- Gavin Shuker - Independent
- Garry Warren - Brexit Party