EXTINCTION Rebellion activists are once again causing significant delays to the X90 and Oxford Tube services to London today, as demonstrators from Oxford said they expected to face arrests.

With the climate group's protest in the capital due to continue all week, scores of road-blocking demonstrators were arrested.

READ AGAIN: Protesters block traffic on Botley Road

It is not yet known if any of the Oxford contingent were among those arrested, but the local group are anticipating that some of their number will be arrested later today.

(Above: Extinction Rebellion activist Ben Kenward, from Oxford, explains why he is taking part in the action).

Yesterday they took part in road blocks on Edgware Road and at Marble Arch.

Oxford Mail: Extinction Rebellion members from Oxford. Picture: Zuhura PlummerExtinction Rebellion members from Oxford. Picture: Zuhura Plummer

They were joined by a London-based Buddhist group who did silent meditation for an hour in front of their road block, activists said.

ALSO READ: Extinction Rebellion Stroud marchers get lively Oxford send off

Meanwhile, bus passengers were told today to expect delays and cancellations to services today.

Oxford Tube tweeted that it was again "Experiencing delays and disruption due to the ongoing demonstration on Park Lane".

It was unable to serve its Marble Arch and Notting Hill Gate stops in either direction, stopping only at Shepherds Bush and Victoria on Oxford Bound services.

Oxford Bus Company faced similar problems.

It tweeted: "Please be reminded that our X90 service is being disrupted due ongoing demonstrations.

"Thank you for your patience."

It added that Magdalen Bridge roadworks were 'causing considerable (further) delays', and to expect delays and cancellations.

Extinction Rebellion Oxford tweeted: "The #InternationalRebellion rebels are holding onto sites across London for a second day.

WATCH: Extinction Rebellion activists occupy Westgate Centre in latest climate protest

"If you care about #ClimateEmergency or #biodiversity loss show your support - pop over in your lunch hour or after work. Even if you can't spare much time you can #RebelForLife"

The United Nation’s Intergovernmental Panel on Climate Change recently warned that there are only 12 years to take urgent action to cut the risk of extreme heat, drought, floods and poverty.