Lifting part of a glueless laminate floor?

[cubegame]

Hindsight is a wonderful thing........as this tale will tell.

We put down a laminate floor in our spare bedroom a couple of years ago and at the time decided to not worry about laying it over where the central heating pump was. We thought the pump would have more years of service left than the laminate and there wasn't really an alternative anyway.

Of course, the pump has now packed in and I need to get to it. The pump is near the airing cupboard adjacent to on of the walls. The layout of the room is like this:-

________________________________
| Airing Cupboard |
| Airing Cupboard |
| Airing Cupboard |
| Airing Cupboard |
| Airing Cupboard |
________________
|
|
|
| X PUMP
|
|
|
|
|
|
___________
Door

The laminate planks run from left to right. I can get access to one edge of the floating floor inside the airing cupboard and have already tried lifting and replacing that panel with success. The left edge of the laminate is butted against cork strip under the skirting board. I think that I need to remove three and maybe four planks.

Are there any removal techniques which might help? Removing the whole floor is not an option.