BRETT D'Oliveira hit the first double hundred of his career as Worcestershire secured maximum batting points in the Specsavers County Championship Division Two clash with Glamorgan at Cardiff.

D'Oliveira (202 not out) went to the landmark with his 32nd four, a flick to the square leg boundary off Michael Hogan, from his 359th ball.

The visitors immediately declared on 456-6 from 120.2 overs after claiming all five batting points for the third successive game.

Then Joe Leach (2-15) and Ed Barnard made early inroads with the new ball in reducing Glamorgan to 8-3 at one stage.

D'Oliveira, who last week scored his maiden Championship ton against Essex at New Road, was involved in a stand of 253 in 57.5 overs for the third wicket with Joe Clarke.

They raced past the 400-mark in the 108th over after resuming on 343-2 despite a 40-minute break for rain on day two at the Swalec Stadium.

Clarke's excellent knock ended on 133, which was just two short of his career best.

The 19-year-old got an inside edge to a delivery from Craig Meschede and wicketkeeper Mark Wallace held on to a fine catch to his left.

Clarke hit one six and 19 fours in his 166-ball knock.

The partnership fell 11 runs short of the County's highest third-wicket partnership against Glamorgan of 264 by Brett's late father Damian D'Oliveira and Graeme Hick at Abergavenny in 1990.

Tom Kohler-Cadmore showed his aggressive intent by picking up two with a scoop shot from his second ball against Meschede.

He hit the same bowler for six over mid-wicket before three wickets fell in successive overs.

Kohler-Cadmore (10) lofted Graham Wagg to long-off, Ross Whiteley (0) was caught behind off Hogan and Ben Cox (1) edged Wagg to second slip.

D'Oliveira was undefeated on 180 from 341 balls with 27 fours when lunch was taken on 411-6 from 113 overs.

New Zealander Mitchell Santner, on his debut, made 23no in adding an unbroken 46 with D'Oliveira before the declaration.

Leach then made a double breakthrough when Glamorgan launched their reply, striking in his second over when Nicholas Selman (4) was trapped lbw.

The next delivery accounted for Will Bragg (0) with Kohler-Cadmore taking a good catch at slip to leave Glamorgan on 8-2.

Worcestershire struck again without addition to the score when Barnard, who shared the new ball with Leach, yorked Wallace for four.

It left Jacques Rudolph and Chris Cooke with the task of trying to repair the damage.

But it became 40-4 when Rudolph was run out after a superb throw from the extra cover boundary by Santner into the hands of Cox.

Glamorgan were on 42-4 with Cooke on 27no when rain and bad light ended play for the day.